Supporters of Egypt's deposed president Mohamed Morsi have clashed with security forces on the streets of Cairo, even as the country's interim leadership struggled to agree on a new prime minister.
There were conflicting reporters about the casualties, but activists of Morsi's Muslim Brotherhood said 34 of its supporters were killed in the shootings after police stormed their peaceful sit-in, demading the reinstatement of Morsi, who was ousted by a military coup last week.
Mohamed Mohamed Ibrahim El-Beltagy, a Brotherhood MP, described the incident during the early hours of Monday as a "massacre" during dawn prayers.
The group said the dead and injured have been taken to a makeshift hospital in Nasr City, a neighbourhood in the Egyptian capital.
The latest violence came even as a lack of consensus blocked the interim leadership's efforts to pick a prime minister.