Supporters of former president Mohamed Mursi rallying at Khazendar Mosque in Shubra assaulted pro-army demonstrators near the Dawaran Shubra area, injuring dozens, eyewitnesses told Aswat Masriya.
Several pro-army demonstrators suffered wounds from shotgun pellets and were taken to al-Sahel Hospital, the eyewitnesses added.
Pro-Mursi demonstrators fired shots in the air, causing a state of chaos in the area and bringing traffic to a halt.
The area's residents formed vigilante groups to prevent Mursi's supporters from returning and rallying again at the mosque.
