CAIRO — One protester was killed Sunday and more than 60 were injured in clashes that erupted in Damanhour between members of the Muslim Brotherhood and others opposing President Mohammed Morsi’s constitutional declaration that grants him full immunity from all state bodies including the judiciary.

Islam Masoud, a 15-year-old student died after allegedly being brutally beaten by armed men during violent confrontations in front of the Muslim Brotherhood’s headquarters in the Nile Delta city of Damanhour, some 150 miles northeast of the capital Cairo. The Freedom and Justice Party claimed that Masoud is one of its members.

Saad El-Katatni, a top officer of the Freedom and Justice Party and speaker of Egypt’s now-dissolved parliament, commented on his Twitter account saying that “the killing of a party member, the continued thuggery and torching the party’s offices confirms that there are people who want to spread anarchy across Egypt.”

While clashes continued, a statement by Egypt’s presidency announced that Morsi’s constitutional declaration will not be withdrawn or at least revised.