Mina Aboud Sharween, a Christian priest, was attacked Saturday as we walked in the Masaeed area in El Arish, which is closed to the Gaza strip, in the early afternoon.
Morsi's Muslim Brotherhood has reportedly criticized Egypt's spiritual leader, Pope Tawadros, for approving the outing of the president and attending a ceremony lead by the head of the army General Abdel Fatah al-Sisi, where Egypt's constitution was suspended.
Adly Mansour has since been sworn in as Egypt's interim president. Morsi suporters have vowed to stay on the streets until the former president is reinstated.
Saturday's shooting came in response to the arrest of several leaders of the Muslim Brotherhood on Friday.