Tilhengere av avsatte Muhamed Morsi gikk i natt til angrep på opposisjonen både i Alexandria og Kairo. Minst 30 er drept og 210 såret. Det kan synes som om Brorskapet ønsker å utløse kaos.
Tre islamister ble drept da hæren åpnet ild mot pro-Mursi-demonstranter som hadde samlet seg utenfor militærforlegningen der de trodde Mursi blir holdt.
Emergency services official Amr Salama says 12 people died when hundreds of Islamists descended on a rally by opponents of ousted President Mohammed Morsi in the Mediterranean coastal city of Alexandria, opening fire with guns. He says clashes erupted, and police joined on the side of the Morsi opponents.
Meanwhile, an Interior Ministry spokesman says the deputy head of the Muslim Brotherhood, Khairat el-Shater, considered the most powerful man in the organization has been arrested.
Spokesman Hani Abdel-Latif says el-Shater and his brother were arrested late Friday from an apartment in eastern Cairo on allegations of inciting violence against protesters in recent days.
Khaled el-Khatib, a Health Ministry official, says four people were killed near the Republican Guard building in Cairo, where troops opened fire on Morsi supporters marching on the building Friday afternoon.
In Cairo, another person was killed in clashes that erupted after nightfall when Islamists attacked Morsi opponents near Tahrir Square.
Four others died in the northern Sinai city of el-Arish, where Islamists stormed the main government building. Another was killed in the southern city of Assiut.
El-Khatib says 210 people nationwide have been wounded.