Leading Muslim Brotherhood figure Essam al-Erain said on Tuesday the plan for constitutional changes and new elections in the following year, “brings the country back to square one.”

Egypt’s Interim President Adly Mansour issued the decree on Monday, shortly after more than 50 people were killed during the clashes between the army and Morsi supporters outside the Republican Guard barracks in Cairo.

The army says it confronted a group of armed men who were trying to enter the building. An army spokesman also noted that a soldier and a police officer have been shot dead in the attack.

The Brotherhood leaders and field doctors, however, reject the claim, saying that troops tried to break a sit-in by supporters of ousted president, Mohamed Morsi, while they were preparing for prayers.

The African country’s Muslim Brotherhood has called for a nationwide protest on Tuesday, a day after the deadly incident.

Since last week, Egypt has been the scene of rival rallies and clashes between thousands of supporters and opponents of the ousted president.

Morsi was unseated by the military on July 3, and the Chief Justice of Egypt’s Supreme Constitutional Court, Adly Mansour, was sworn in as interim president of Egypt on July 4.

The Brotherhood censured the ouster of Mohamed Morsi as a “Military Coup.”