Egypt's interim administration has published a timetable for a transition to a new democratic government, hours after the Muslim Brotherhood called for nationwide protests after the army shot dead scores of people outside the elite Republican Guards' headquarters in Cairo. 
 
 The interim administration expressed "deep regret" for those killed in violence in Cairo on Monday, adding that it had formed a judicial committee to investigate the events. 
 
 Interim president Adly Mansour on Tuesday morning released details of a timetable for parliamentary elections by 2014, after which a date will be announced for a presidential ballot. 
 
 The country will have five months to amend the current draft constitution, suspended following Mohamed Morsi's removal last week, ratify it in a referendum, and then hold parliamentary elections, according to the text of the 33-article decree published online. 
 
 The whole process will take no more than 210 days, according to the decree, meaning elections will be by February at the latest. 
 
 A senior Muslim Brotherhood official denounced the decree. "A constitutional decree by a man appointed by putchists... brings the country back to square one," said Essam al-Erian in a Facebook posting. 
 
 Al Jazeera's Nicole Johnston, reporting from Cairo, said that some liberal opposition parties have said that instead of the constitution being amended a new one should be made. 
 
 She added that Cairo has been quiet since morning, with a few rallies and protests at Nasr City but not in large numbers. Our correspondent said that more pro-Morsi protesters are expected to turn out later. 
 
 The Brotherhood has called for nationwide protests to take place a day after a deadly shooting at the site of a sit-in by its supporters in Cairo left at least 51 dead and hundreds injured. 
 
 The Islamist group released the names of 42 people killed outside the Republican Guards' building, as the interior ministry and military said two policemen and a soldier were also killed. 
 
 
 
 The military blamed "terrorists", while witnesses, including Brotherhood supporters at the scene, said security forces fired only warning shots and tear gas, and that "thugs" in civilian clothes carried out the shootings. 
 
 
 
 The US called on the Egyptian army to exercise "maximum restraint", while also condemning "explicit" Brotherhood calls to violence. 
 
 'Monday Massacre' 
 
 Mohamed Ibrahim El-Beltagy, a Brotherhood MP, described the shootings during dawn prayers after police had stormed the site as a "massacre". ||||| Media playback is unsupported on your device Media caption Pro-Morsi supporters tell Lyse Doucet they are willing to die for their cause 
 
 Egypt's Muslim Brotherhood has rejected a timetable for new elections laid out by interim president Adly Mansour, saying it is illegitimate. 
 
 The Tamarod protest movement has said it was not consulted on the election plan and has asked to see Mr Mansour. 
 
 Meanwhile, ex-finance minister Hazem el-Beblawi has been named interim prime minister, and opposition figure Mohamed ElBaradei vice president. 
 
 It follows the ousting of President Mohammed Morsi by the army last week. 
 
 It is not yet clear whether Mr Beblawi, a liberal economist, can gain the support necessary to actually become prime minister. 
 
 Mr ElBaradei's own candidacy as prime minister foundered earlier in the week when the hardline Salafist Nour party objected. 
 
 The party withdrew from talks to form a new government, but reports on Tuesday suggested it was back on board. 
 
 'Massacre' 
 
 Nour has described the deaths of at least 51 people on Monday as a "massacre". The incident took place outside the Presidential Guard barracks where Mr Morsi's supporters say he is held. 
 
 The Muslim Brotherhood - Egypt's main Islamist movement, to which Mr Morsi belongs - says its members were fired on at a sit-in for the ousted leader. The army says it responded to an armed provocation. 
 
 As a people pull apart, fear grows not just about saving a revolution, but a country too 
 
 Mr Morsi was Egypt's first freely elected president. His removal last Wednesday followed protests by millions of people who accused him of becoming increasingly authoritarian, pursuing an Islamist agenda, and failing to tackle Egypt's economic woes. 
 
 The Brotherhood has denounced the military's action as a coup. 
 
 According to the Reuters news agency, the Nour party has said it will support Mr Beblawi's appointment, but that it is still studying the nomination of Mr ElBaradei, a former chief nuclear official for the United Nations. 
 
 'Invalid' 
 
 Mr Mansour's decree, issued late on Monday, laid out plans to set up a panel to amend the suspended Islamist-drafted constitution within 15 days. 
 
 The changes would then be put to a referendum - to be organised within four months - which would pave the way for parliamentary elections, possibly in early 2014. 
 
 Once the new parliament convenes, elections would be called to appoint a new president. 
 
 Mr Erian, deputy chairman of the Brotherhood's political wing, the Freedom and Justice Party (FJP), said the declaration was "a constitutional decree by a man appointed by putchists" which "brings the country back to square one". 
 
 Adly Mansour's transition timeline Panel formed within 15 days to review constitution 
 
 Constitutional amendments to be finalised and put to referendum in four months 
 
 Parliamentary elections to be held by early 2014 
 
 Presidential elections to be called once new parliament convenes Key players in the Egyptian crisis Is Egypt heading for holy war? 
 
 Ahmad Abu-Barakah, a legal adviser to the FJP, said the decree was "invalid and illegitimate", the private Al-Misri al-Yawm news site reports. 
 
 The Brotherhood's spokesman Gehad el-Haddad told AFP news agency that further protests and sit-ins would be held across the country on Tuesday, as funerals are held for supporters killed in Monday's violence in Cairo. 
 
 Brotherhood supporters camping outside the Rabaa al-Adawiya mosque in north-east Cairo also expressed their anger. 
 
 "No-one voted for this president," Ashraf Awad told the Associated Press news agency. "He is illegitimate in being sworn in, so all decisions he makes, people will not recognise." 
 
 Another protester, Hamdi el-Said, said Mr Morsi remained his president. "I will defend my vote which I gave to him until I become a martyr like the people who were killed yesterday," he said. 
 
 Conflicting reports 
 
 The Muslim Brotherhood has described what happened outside the Presidential Guard barracks on Monday as a "massacre", and has called for "an uprising by the great people of Egypt against those trying to steal their revolution with tanks". 
 
 Image caption Maram Omar, 19, student Morsi came through ballot boxes, and he should only leave in the same way Egypt clashes: Divided views 
 
 It says the army raided a peaceful sit-in as protesters were performing dawn prayers, and that 53 people were killed. 
 
 The health ministry said at least 51 people were killed and 435 people wounded. 
 
 But army spokesman Col Ahmed Mohammed Ali said troops only opened fire after a group armed with live ammunition, petrol bombs and stones attacked them. 
 
 He said that two police and one soldier were killed in the exchange of fire. Eight soldiers were critically wounded. 
 
 Col Ali also disputed claims that children had died, saying pictures of dead children posted on the internet were in fact images taken in Syria in March. 
 
 Mr Morsi is believed by the Brotherhood to be held at the barracks, but the military says he is elsewhere. 
 
 The killings follow an incident in the same location on Friday in which three people died and dozens were wounded as troops fired on crowds. 
 
 Mr Mansour has appealed for calm, and has ordered an investigation into the incident. 
 
 Media playback is unsupported on your device Media caption Spokesman for the Egyptian ministry: "There was a treacherous attack" 
 
 In response to the killings the grand sheikh of al-Azhar University, Ahmed al-Tayeb - seen as the highest authority in Sunni Islam - warned of civil war and said he was going into seclusion until the violence was over. 
 
 The BBC's Jim Muir in Cairo says the crisis in Egypt remains acute, and any move to defuse it politically will be hostage to developments and possible violence on the ground,. 
 
 Lyse Doucet: The struggle to save Egypt's revolution 
 
 Frank Gardner: Is Egypt heading for holy war? 
 
 Key players in the Egyptian crisis 
 
 Egypt clashes: Divided views ||||| Egypt was rocked by its deadliest day since its Islamist president was toppled by the military, with more than 50 of his supporters killed by security forces as the country's top Muslim cleric raised the specter of civil war. 
 
 Supporters of ousted President Mohammed Morsi protest at the Republican Guard building in Nasr City, Cairo, Egypt, Tuesday, July 9, 2013. Egyptian security forces killed dozens of supporters of Egypt's... (Associated Press) 
 
 A supporter of ousted Egyptian President Mohammed Morsi stands outside a local hospital in Cairo holding a bloodied shirt he says belongs to a protester shot by soldiers during a demonstration, Monday,... (Associated Press) 
 
 Egyptian army stand guard around the Republican Guard building in Nasr City in Cairo, Egypt, Monday, July 8, 2013. Egyptian soldiers and police opened fire on supporters of the ousted President Mohammed... (Associated Press) 
 
 A wounded supporter of Egypt's ousted President Mohammed Morsi receives treatment at a local hospital in Cairo, Egypt, Monday, July 8, 2013. Egyptian soldiers and police guarding the Republican Guard... (Associated Press) 
 
 Egyptian army soldiers take their positions near armored vehicles to guard the entrances of Tahrir square, in Cairo, Egypt, Monday, July 8, 2013. Egyptian military officials said gunmen killed at least... (Associated Press) 
 
 A supporter of ousted President Mohammed Morsi with a national flag gestures to army soldiers guard at the Republican Guard building in Nasr City, Cairo, Egypt, Tuesday, July 9, 2013. Egyptian security... (Associated Press) 
 
 A national flag waves on the barbed wire as army soldiers guard at the Republican Guard building in Nasr City, Cairo, Egypt, Tuesday, July 9, 2013. Egyptian security forces killed dozens of supporters... (Associated Press) 
 
 Egyptian armed forces spokesman Col. Ahmed Mohamed Ali talks during a press conference in Cairo, Egypt, Monday, July 8, 2013. Ali said police and troops guarding the Republican Guard complex came under... (Associated Press) 
 
 A wounded supporter of deposed Egypt's President Mohammed Morsi lies at a local hospital in Cairo. Egypt, Monday, July 8, 2013. Egyptian soldiers and police opened fire on supporters of the ousted president... (Associated Press) 
 
 A wounded supporter of deposed Egypti's President Mohammed Morsi sits at a local hospital in Cairo. Egypt, Monday, July 8, 2013. Egyptian soldiers and police opened fire on supporters of the ousted president... (Associated Press) 
 
 A wounded supporter of deposed Egypti's President Mohammed Mursi is treated at a local hospital in Cairo. Egypt, Monday, July 8, 2013. Egyptian soldiers and police opened fire on supporters of the ousted... (Associated Press) 
 
 Medics sitin a makeshift hospital after Egyptian soldiers and police opened fire on supporters of the ousted President Mohammed Morsi, on the photo, early Monday in Cairo, Egypt, Monday, July 8 , 2013.... (Associated Press) 
 
 Egyptian army soldiers take their positions on top of their armored vehicle to guard the entrances of Tahrir square, in Cairo, Egypt, Monday, July 8, 2013. Egyptian military officials said gunmen killed... (Associated Press) 
 
 Supporters of ousted President Mohammed Morsi protest as army soldiers guard at the Republican Guard building in Nasr City, Cairo, Egypt, Tuesday, July 9, 2013. Egyptian security forces killed dozens... (Associated Press) 
 
 Supporters of ousted President Mohammed Morsi protest as army soldiers guard at the Republican Guard building in Nasr City, Cairo, Egypt, Tuesday, July 9, 2013. Egyptian security forces killed dozens... (Associated Press) 
 
 An Egyptian man cries outside a morgue after carrying the corpse of his brother killed near the Republican Guard building in Cairo, Egypt, Monday, July 8, 2013. Egyptian soldiers and police opened fire... (Associated Press) 
 
 The corpse of a supporter for Egypt's ousted President Mohammed Morsi is brought to a morgue in Cairo, Egypt, Monday, July 8, 2013. Egyptian soldiers and police opened fire on supporters of the ousted... (Associated Press) 
 
 A man displays a bloodied wallet belonging to a supporter of ousted President Mohamed Morsi's outside a local hospital in Cairo. Egypt, Monday, July 8, 2013. Egyptian soldiers and police opened fire on... (Associated Press) 
 
 The body of a supporter for Egypt's ousted President Mohammed Morsi lies in an ambulance in Cairo, Egypt, Monday, July 8, 2013. Egyptian soldiers and police opened fire on supporters of the ousted president... (Associated Press) 
 
 The military found itself on the defensive after the bloodshed, but the interim president drove ahead with the army's political plan. He issued a swift timetable late Monday for the process of amending the Islamist-backed constitution and set parliamentary and presidential elections for early 2014. 
 
 The killings further entrenched the battle lines between supporters and opponents of ousted President Mohammed Morsi, who was removed by the military July 3 after a year in office following mass demonstrations by millions of Egyptians. 
 
 Morsi's Muslim Brotherhood called for an uprising, accusing troops of gunning down protesters, while the military blamed armed Islamists for provoking its forces. 
 
 The shootings began during a protest by about 1,000 Islamists outside the Republican Guard headquarters where Morsi, Egypt's first freely elected leader, was detained last week. Demonstrators and members of Morsi's Muslim Brotherhood said troops descended on them and opened fire unprovoked as they finished dawn prayers. 
 
 "I was in the last row praying. They were firing from the left and right," said Nashat Mohammed, who had come from southern Egypt to join the sit-in and was wounded in the knee. "We said, `Stop, we're your brothers.' They shot at us from every direction." 
 
 After a battle lasting about three hours, at least 51 protesters were killed and 435 wounded, most from live ammunition and birdshot, emergency services chief Mohammed Sultan told to the state news agency. 
 
 At a nationally televised news conference, Army Col. Ahmed Mohammed Ali said police and troops came under "heavy gunfire" at around 4 a.m. and attackers on rooftops opened fire with guns and Molotov cocktails. A soldier and two policemen were killed, and 42 in the security forces were wounded, eight critically, he said. 
 
 While he said troops had a right to defend the facility, Ali did not directly explain how the protester deaths occurred. He expressed condolences but offered no apologies for the deaths. 
 
 A collection of video of the clashes provided by the military to Egyptian TV showed protesters on rooftops lobbing projectiles at troops below, including firebombs and toilet seats. It also showed some armed protesters firing at close range at the troops, but it did not show what the military did. It was also not clear at what time in the fighting the videos were shot. It included aerial views of the clashes. 
 
 Several witnesses from outside the protest said the gunfire started when troops appeared to move on the camp. 
 
 University student Mirna el-Helbawi told The Associated Press that she watched from her 14th floor apartment overlooking the scene, after she heard protesters banging on metal barricades, a common battle cry. El-Helbawi, 21, said she saw troops and police approaching the protesters, who were lined up on the street behind a make-shift wall. The troops fired tear gas, the protesters responded with rocks, she said. 
 
 Soon after, she heard the first gunshots and saw the troops initially retreat backward _ which she said led her to believe the shots came from the protester side. She saw Morsi supporters firing from rooftops, while the troops were also shooting. 
 
 The Freedom and Justice party, the Muslim Brotherhood's political arm, called on Egyptians to rise up against the army, which it accused of turning Egypt into "a new Syria." 
 
 "This could be a moment of extremism for both sides" of the equation, Mohammed Mahsoub, a member of the Islamist Wasat Party told Al-Jazeera TV. 
 
 The sole Islamist faction that backed Morsi's removal, the ultraconservative Al-Nour Party, suspended its participation in talks on forming a new leadership for the country. The group is now torn by pressure from many in its base, furious over what they saw as a "massacre" against Islamists. 
 
 Reeling from scenes of bloodied protesters in hospitals and clinics, many with gaping wounds, some of Egypt's politicians tried to push new plans for some sort of reconciliation in the deeply polarized nation. 
 
 Sheik Ahmed el-Tayeb, the grand imam of Al-Azhar, the most prominent Sunni Muslim institution, demanded that a reconciliation panel with full powers immediately start work and that those detained in recent days be released. Five prominent Brotherhood figures have been jailed since Morsi's fall, and Morsi himself is held in detention in an unknown location. 
 
 El-Tayeb's announcement he was going into seclusion was a symbolic but dramatic stance _ a figure seen as a moral compass by many Egyptians expressing his disgust with all sides in the events. Egypt's Coptic popes have at times gone into seclusion to protest acts against the Christian community, but the sheik of Al-Azhar has never done so. 
 
 Struggling whether to fully bolt from the new leadership, the ultraconservative Al-Nour Party denounced what it called incitement against fellow Islamists. Speaking to Al-Jazeera TV, the party's chief Younes Makhyoun raised the possibility of calling a referendum on Morsi as a compromise measure. 
 
 There were multiple calls for an independent investigation into the bloodshed as a way to establish the truth and move forward. 
 
 The military-backed interim president, Adly Mansour, ordered a judicial inquiry into the killings. Significantly, the statement from his office echoed the military's version of events, saying the killings followed an attempt to storm the Republican Guard's headquarters. 
 
 The new leadership announced a fast-track timetable that would lead to elections for a new parliament within about seven months. 
 
 Under the plan, two panels would be appointed to made amendments to the constitution passed under Morsi. Those changes would be put to a referendum within about 4 1/2 months. Parliamentary elections would be held within two months, and once the new parliament convenes it would have a week to set a date for a presidential election. 
 
 The swift issuing of the plan reflected a drive to push ahead with a post-Morsi political plan despite Islamist rejection _ and is certain to further outrage the Brotherhood. 
 
 Egypt's escalating crisis could further complicate its relations with Washington and other Western allies, which had supported Morsi as the country's first freely elected leader and now are reassessing policies toward the military-backed group that forced him out. 
 
 Still, the White House said Monday that cutting off the more than $1 billion in annual aid to Egypt was not in the U.S.'s best interests, though it was reviewing whether the military's moves constitute a coup _ which would force such a measure under U.S. law. 
 
 But Egypt's new leadership appeared to be pushing ahead with the "road map" the military set up for the post-Morsi political system. Negotiations have been ongoing over appointing a prime minister, who will hold the main powers in governing the country. Talks have been stalled by Al-Nour Party vetos of candidates from liberal and secular factions _ but if the party drops out, those factions may push through a candidate. 
 
 At the same time, the military was pushing hard to isolate Islamists from public support, depicting their protests as rife with gunmen and weapons. 
 
 Ali said the sit-in outside the Guard headquarters had "abandoned peacefulness." Ali also pointed to other incidents of Islamist violence, including coordinated, deadly attacks by extremists on military installations in the Sinai Peninsula. 
 
 Prosecutors in Cairo also ordered the closure of the Brotherhood party's headquarters amid investigations into a cache of weapons found there, according to the official Middle East News Agency. 
 
 During the wave of protests last week that led to Morsi's removal, Brotherhood supporters used guns in several instances to defend their offices when opponents marched on them _ or outright attacked them. 
 
 Pushing ahead with the military "road map" is likely to further infuriate Islamists who have vowed to continue protests until Morsi is restored and now depict the military as willing to wipe them out by force of arms. 
 
 Outside hospitals and clinics near Monday's violence, Morsi supporters waved the bloodied shirts of the dead or wounded. 
 
 "The only thing the military understands is force and they are trying to force people into submission," said Marwan Mosaad, speaking at a field hospital run by Morsi's supporters. "It is a struggle of wills and no one can predict anything." 
 
 Abu Ubaida Mahmoud of Al-Azhar University said he had been praying when the sit-in's security teams began banging on metal barricades in warning. He then saw troops coming out of the Guard complex. 
 
 "The number of troops that came from inside was stunning," said Mahmoud, who was wounded in the hand. 
 
 It was "as if they were firing at an enemy," said another protester, Ahmed Youssef. 
 
 By the afternoon, the sit-in site was cleared along with blockades that had been set up on roads. The site of the early morning clashes, a strip of road about a kilometer long (about half a mile), was covered with rocks, shattered glass, shoes, clothes, prayer rugs and personal photographs. 
 
 A big Morsi banner remained hoisted in front of the Republican Guards' building. On the ground below it, graffiti read: "Where are our votes?" 
 
 ____ 
 
 Associated Press correspondent Paul Schemm contributed to this report.
– Egypt's interim leadership has set an elections timetable to establish a new democratic government, but the Muslim Brotherhood immediately rejected the idea and has called for an "uprising." The interim administration wants the current, suspended draft constitution to be amended and ratified in a referendum; parliamentary elections by 2014; and presidential elections after that, al-Jazeera reports. But here's the response from a senior Muslim Brotherhood official on Facebook: "A constitutional decree by a man appointed by putchists ... brings the country back to square one." And a legal adviser for the Brotherhood's political arm called Adli Mansour's decree "invalid and illegitimate," the BBC reports. The Brotherhood wants nationwide protests today, in the wake of 51 Morsi supporters being shot dead during a Cairo sit-in yesterday, which it is calling a "massacre." The interim administration expressed "deep regret" for yesterday's violence, while the military blamed it on "terrorists." Witnesses say civilian "thugs," not security forces, fired the lethal shots. It's very unclear exactly what happened, reports the AP, which has a more detailed look at the violence. Meanwhile, the Washington Post takes a look at what's at stake for the Brotherhood, which rose from a banned, oppressed organization to a powerful one within a decade, and now must decide whether to fight rather than return to lives of persecution, ousted from the political process.