At least 40 people have been killed in a shooting incident in Cairo, amid ongoing unrest over the removal of Egypt's President Mohammed Morsi.
The Muslim Brotherhood says its members were fired on at a barracks where they believe Mr Morsi is being held, during a sit-in demanding his reinstatement.
However the army said a "terrorist group" had tried to storm the barracks.
Mr Morsi, an Islamist and Egypt's first freely elected leader, was ousted by the army last week after mass protests.
Scores of people have been killed since the unrest began at the end of last month.