The vicinity of Alexandria's security governorate saw fierce clashes after protesters locked horns with police forces on Saturday evening.
Protesters voiced anger after a video that showed a grown man beaten up, stripped and dragged on the asphalt late Friday near Cairo's presidential palace.
As tensions escalated near Alexandria's security governorate, police forces fired rounds in the air as demonstrators lit up fireworks and flares.
Both sides also exchanged stones as a number of civilians were arrested.
Egypt has been hit by turmoil since 25 January – the second anniversary of the 2011 Revolution.