Opponents and supporters of President Mohamed Morsy engaged in armed clashes in Alexandria on Friday evening.
Amid the clashes demonstrators broke into the city's local council building.
Gunshots were heard in the area, and the two sides threw stones at the other.
Some of the anti-Morsy demonstrators were in a march coming from Sidi Gaber, protesting the recent clashes at the presidential palace in Cairo, when they left the march to go to the city's local council building.
In Tanta, a crowd of Morsy opponents set fire to the Freedom and Justice Party's headquarters.
By late Friday, the Health Ministry announced that a total of 53 injuries from the day's marches and protests in Cairo and other governorates, with no deaths reported.
Edited translation from Al-Masry Al-Youm
