Twelve people were wounded, including one in critical condition, in Friday's confrontations between supporters and opponents of ousted President Mohamed Mursi, a medical source said. 

The injuries ranged from cuts to birdshot wounds, the source said, adding that the wounded were transferred to local hospitals to receive medical attention. 

Thirty-two people were arrested in the confrontations as investigations continue to identify the perpetrators and their motives, Alexandria's security director said.