( CNN ) -- With nearly all of the vote counted , the referendum on Egypt 's new constitution appeared to be victorious early Sunday , according to unofficial tallies by the Muslim Brotherhood and the semi-official al-Ahram newspaper . The Muslim Brotherhood said its `` final results '' show 64 % of the vote in favor of the constitution and 36 % against it . Al-Ahram posted a similar outcome on its website , saying it was based on 98 % of the votes counted . The official outcome of the referendum is not expected to be announced until later Sunday . Saturday saw a second round of voting , this time in 17 provinces largely loyal to President Mohamed Morsy and his ruling party . Voting at the more than 6,700 polling stations stayed open an extra four hours before finally closing at 11 p.m. ( 4 p.m . ET ) . The first round of voting a week ago took place in more liberal provinces like Cairo . But the referendum passed in that round with 56.6 % of the vote , leading many to predict an even higher result Saturday . The Supreme Electoral Commission plans to publicize the official results in a news conference . Deep friction in Egypt 's society and institutions accompanied the draft constitution since its inception . For a second week , clashes broke out Friday in the coastal Mediterranean city of Alexandria between Muslim Brotherhood protesters , who were supporting a local imam and Morsy , and opposition demonstrators . Stones were hurtled , leaving 77 injured , according to official news agency Egynews . Riot police intervened and fired tear gas , according to state-run Nile TV . Last week 's confrontation was triggered by the imam 's call urging demonstrators to back the constitution . Voting was tainted by allegations of widespread abuses . A coalition of 123 local rights groups that monitored last week 's voting complained of voter intimidation , bribery , and other violations ; the nation 's electoral commission promised to investigate . Turnout for both weeks of voting was high . Security was tight , and voting happened peacefully . Critics of the constitution say it was passed too quickly . Liberals , Christians and other minority opposition groups say they felt excluded from the Constituent Assembly that drafted it and that the wording does not include their voices . They want a new assembly . Opposition members say the charter uses vague language and will not protect the rights Egyptians fought for in last year 's revolution , which ousted former President Hosni Mubarak . Supporters of the constitution herald what they say is its protection of personal rights , especially its provisions on handling of detainees in the judicial system , which made capricious use of its powers under the former government . International rights group Human Rights Watch said the constitution `` protects some rights but undermines others . '' It `` fails to end military trials of civilians or to protect freedom of expression and religion . '' The rocky road to the referendum began when judges threatened to shut down the assembly tasked with drafting the constitution . Morsy then issued an edict in late November declaring all of his past and present decisions immune from judicial review until the holding of the constitutional referendum . He also sacked the head of the judiciary , which had many members who were still loyal to Mubarak . The Islamist president 's opposition saw the exceptional moves as a grab for dictatorial powers and poured into the streets , converting Tahrir Square in central Cairo back into the center of public discontent it had been during the uprising that brought down Mubarak . Morsy dropped his decree , but the situation remained tense . Violence raged , producing incidents that have raised the ire of international human rights groups , though these have not been systematic , as was the case under the former government . The outcome of the election is important to the stability of volatile North Africa and the Middle East -- where Egypt is a key player .
The Muslim Brotherhood says 64 % of the vote was in favor . Comment: The official results are not expected until later Sunday . Saturday was the second round of voting .