CAIRO
Army troops have closed roads leading to protest areas where thousands are camping to demand the return of ousted President Mohammad Morsi to power.
Witnesses said troops closed the 6th October Bridge leading to Nasr City, where thousands of Morsi's loyalists have been camping at Rabaa Al-Adawiya in eastern Cairo.
A bridge leading to Nahda square near the Cairo University in Giza has also been closed.
Army tanks were deployed at the entry points to the two squares.
The security measures came shortly after tens of Morsi supporters were killed outside the Republican Guards compound near Rabaa Al-Adawiya.
The Egyptian Ambulance Authority (EAO) said 42 people were killed and 322 were wounded outside the Republican Guards HQ.
A field hospital set up by Morsi supporters said at least 53 people were killed and nearly a thousand wounded when army and police forces opened fire on peaceful protesters outside the compound.
The army said one officer was killed and several soldiers were wounded in an attempt by “a terrorist group” to storm the compound.
Thousands of supporters have been camping outside the Republican Guards HQ to protest the army's removal of Morsi, Egypt's first democratically elected president.