CAIRO: Egyptian President Mohamed Morsi has called on the country's prosecutor's office to investigate recent events that left two protesters dead. It came a day after a 15-year-old boy was killed in the Nile Delta city of Damanhour after anti-Morsi protesters and the Muslim Brotherhood, of which Morsi came out of to win the first democratic election last summer, left the boy dead. The Brotherhood has claimed the 15-year-old as a member, which has sparked frustrations among activists, who have gone on social networking sites like Facebook and Twitter to demand he be referred to as an “Egyptian martyr” and not Brotherhood. Other activists have told Bikyamasr.com they feel this is a political move to shore up the Brotherhood base. “I feel sad because there was no call for an investigation when an anti-Morsi protester was killed. It is a sad state of affairs for Egypt right now,” said one protester who was camping out in Tahrir Square against Morsi's recent presidential decree that gives him powers above the rule of law. The president's office, in a statement on Monday, called for justice for those responsible for the deaths of Gaber Saleh and Islam Masoud. Saleh, who was a member of the April 6 Youth Movement, was killed in battles with police in Tahrir Square last week while Masoud, who was reportedly a member of the Muslim Brotherhood, was killed on Sunday in fights that broke out near the Brotherhood's Damanhour headquarters. In a statement on Monday, President Mursi's office expressed “remorse” for the deaths of both Gaber and Masoud, insisting that “those responsible will be prosecuted,” reported the Middle East News Agency. The statement called on all parties to exercise self-restraint and keep their means of expression peaceful. It comes a Monday saw a return to a tenuous calm in Cairo after four days of intense street battles between protesters and police. Hundreds of protesters have been injured in the ongoing violence, spurred on by near constant tear gas and rubber bullets being fired by police towards the protesters. According to the ministry of interior on Sunday, over 275 “troublemakers" have been detained by police in the clashes. On Saturday evening and Sunday morning, videos began to emerge showing police beating protesters they had gotten their hands on, sparking more anger among activists who are calling for the immediate withdrawal of presidential decrees that grant President Mohamed Morsi near complete power above the rule of law. The ministry added that they are to take legal action against those arrested. The ministry added that only 164 have been injured in the violence, although even the ministry of health puts the number over 200. Field hospital volunteer doctors have told Bikyamasr.com that they are at full capacity, with doctors at Doubara Church near Tahrir saying on Sunday that they “cannot take anyone else. We have too many people."