viagra approved http://christiansforve.org.au/wp-admin/includes/class-wp-screen.php geneva;”>One eyewitness from the Muslim Brotherhood told the BBC the army used live ammunition to disperse the crowds in the eastern Nasr City district.
Dozens of people were injured and taken to a nearby makeshift hospital.
Mr Morsi, Egypt’s first Islamist president, was removed by the army last week after mass protests against him.
Eyewitnesses say the army raided the sit-in the Presidential Guards Club, where Mr Morsi is believed to be held, at about 04:00 (02:00 GMT) as many of the protesters were performing dawn prayers.
Egyptian media report that the army and police forces opened fire after a group of demonstrators tried to climb the walls of the club.
Muslim Brotherhood spokesman Mostafa el-Khatib told the BBC’s Ahmed Maher in Cairo that he saw seven dead bodies in the hospital with gunshots to their chests and heads.
The army has so far made no comment on the claim.
On Sunday, tens of thousands of both supporters and opponents of Mr Morsi rallied in many Egyptian cities.
Mr Morsi was replaced on Thursday by Adly Mansour – the head of the Supreme Constitutional Court – who promised to hold elections soon but gave no date.