May 2, 2012
At least 20 people have been killed in Cairo in an attack on a protest near the Egyptian Ministry of Defence.
The unknown attackers used rocks, clubs, firebombs and shotguns. The protesters retaliated, beating some assailants.
Soldiers and police have now intervened to stop the clashes, but as long as six hours after the violence started.
Two leading presidential candidates have suspended campaigning in protest at the way authorities handled it.