More than 100 people have been killed and 1,500 injured at a protest held by Islamic fundamentalist supporters of arrested Former Egyptian President Mohammed Morsi in Cairo, doctors say.
The army ousted Mr Morsi on 3 July.
He has been formally accused of murder, relating to a 2011 jail outbreak, and of links to the militant group Hamas.
Both pro- and anti-Morsi demonstrators held huge protests overnight in the capital, the anti-Morsi demonstrations were much larger, but in contrast to the militants, the anti- Morsi protesters were peaceful.
The anti-Morsi demonstrators occupied Cairo's Tahrir Square in support of the army, after its chief, Gen Abdel Fattah al-Sisi, had urged people to demonstrate to show that most Egyptians oppose the Islamist MB.
Egyptian security forces were required to fire on Islamists actively promoting violence.