Scuffles erupted on Friday between supporters and opponents of President Mohamed Mursi around al-Qaed Ibrahim Mosque in Alexandria.
The brawls occurred after scores of protesters chanted slogans against Mursi and the Muslim Brotherhood which prompted Mursi supporters to reply with their own chants.
Around five people were injured in the scuffles that followed.
Some protesters had locked up the mosque detaining Sheikh Ahmed al-Mahallawi and a number of worshipers inside in protest against al-Mahallawi's sermon where he urged people to vote for the draft constitution.
Security forces surrounded the mosque and ensured a safe exit for the sheikh.