Cairo ( CNN ) -- Convulsions of violence followed the fierce clashes that killed dozens of people Sunday in Egypt , when Muslim Brotherhood supporters clashed with their opponents and security forces . By Tuesday , the death toll from Sunday 's violence climbed to 55 . That number could continue to rise , as some of the 250 injured could succumb to their wounds . On top of that , six Egyptian soldiers have died in attacks since Sunday . In the city of Port Said , a group of attackers shot and killed an Egyptian soldier on Tuesday , according to state-run media . And on Monday , Islamist militants in the Sinai killed five Egyptian soldiers in the town of Ismailia , state media said . In the village of Al-Tor , they set off a car bomb that killed two people and wounded 48 , state media reported . Jihadists have stepped up their assaults since Egypt 's military forcibly removed former President Mohamed Morsy from office in July . Elsewhere in the country , his supporters continue vent their anger in the streets despite the muscle government security forces have applied to suppress and disperse them . Sunday 's violence . Early Sunday , Muslim Brotherhood protesters marched in different neighborhoods in Cairo and across the country . In Egypt 's capital , people swam across the Nile River to escape arrest as military armored personnel carriers supported police clearing the streets of protesters . Tear gas filled the air , and security forces with batons beat some of the protesters they detained . It was another powerful sign that Egypt 's military-backed interim government will go to almost any measure to shut down the Muslim Brotherhood 's protests . But in nearby Tahrir Square , the scene was drastically different ; throngs of people celebrated Egypt Armed Forces Day at a festive event that included dancing and fireworks . As thousands of Muslim Brotherhood protesters marched along the Nile from Old Cairo toward Tahrir , security forces blocked their path and quickly dispersed the crowd . Quelling the Muslim Brotherhood . In a statement , the Muslim Brotherhood 's Freedom and Justice Party decried what it called `` crimes of violence and murder committed today against peaceful protesters . '' The group also said it holds the leaders of the coup that ousted Morsy responsible . Egypt 's Interior Ministry said it had arrested 423 `` rioters '' on Sunday . In September , an Egyptian court banned all activities of the Muslim Brotherhood and froze its finances , drawing complaints from the international community . At the United Nations General Assembly , Egypt 's interim foreign minister sought to quell these concerns . Nabil Fahmy said Egypt will hold elections in the spring . He also argued that the political process is open to all `` as long as they are committed to the renunciation of violence and terrorism and acts of incitement to them . '' On Sunday , protesters from the Muslim Brotherhood said they would accept nothing less than the reinstatement of the government led by Morsy . But supporters of the military in Tahrir Square remained adamant that that should n't happen . Neither side appeared willing to compromise . Violent clashes after relative calm . New Egyptian government to be in place by spring , foreign minister says . CNN 's Reza Sayah contributed to this report .
Violence has pockmarked Egypt since Sunday 's clashes that killed dozens . The death toll from those clashes now stands at 55 , with more than 250 injured . Attack on the military killed at least 20 soldiers on Monday and Tuesday . Supporters of Egyptian President Morsy keep fighting despite pressure from the military .