Updated: July 08, 2013, 12:00 AM
In pictures: Dozens of Morsi supporters killed in Cairo 'massacre'
epa03780442 Members of the Muslim Brotherhood carry an injured supporter of ousted Egyptian President Morsi during clashes with Republican guards forces in Cairo, Egypt, 08 July 2013. According to local sources, supporters of ousted president Morsi clashed during a sit-in outside the Republican guards barracks, early 08 July, tear gas and gunfire were used, at least 10 people are reported killed. Egyptian army armored vehicles were deployed near Tahrir square in order to secure it. EPA/MOHAMMED SABER
At least 42 people have been killed in Cairo and hundreds injured in what the Muslim Brotherhood said shots were fired at supporters of deposed Egyptian President Mohammed Morsi near the military building where he is being held. Mahmoud Khaled / AFP Photo?
He said shooting broke out in the early morning while Islamists were praying and staging a peaceful sit-in outside the Republican Guard barracks. "We call on all patriotic brave Egyptians 2 join us ... sitin to defend country from conspiratorial traitors ???
The military said 'a terrorist group' tried to storm the Republican Guard compound and one army officer had been killed and 40 wounded. Soldiers returned fire when they were attacked by armed assailants, a military source said. Asmaa Waguih / Reuters
A Reuters television producer at the scene saw first aid helpers attempting mouth-to-mouth resuscitation on a dying man. Wounded people were being ferried to the field hospital on motorbikes, given first aid treatment and taken away in ambulances. Khaled ???
Military vehicles sealed off traffic in a wide area around the Rabaa Adawia mosque where Morsi supporters led by senior Brotherhood leaders have been staging protests since his ouster. Amr Nabil / AP Photo
The bloodshed deepened Egypt's political crisis, escalating the struggle between the army, which overthrew Mr Morsi last Wednesday after mass demonstrations demanding his resignation, and the Brotherhood, which has denounced what it called a coup. Amr Na???
A medic treats a wounded supporter of deposed Egyptian President Mohanmed Morsi at a local hospital in Cairo. Suhaib Salem / Reuters