The Muslim Brotherhood says the Egyptian military fired on innocent protesters.
51 people were killed in the clashes.
Today the Egyptian military released video that shows pro-Morsi Islamists firing on the military.
Al-Arabiya reported on the clashes:
The Egyptian army on Monday released footage of what it said were Islamist militants mixing with demonstrators and shooting the armed forces.
The Muslim Brotherhood has accused to the army of shooting at peaceful protesters and killing dozens in front of the Republican Guard headquarters.
The military said it was responding to gunfire from militants who infiltrated demonstrator.