A video clip circulated Saturday by Egyptian activists appears to show Islamist supporters of Egypt’s ousted Muslim Brotherhood president Mohammed Morsi throwing two young men off a ledge during demonstrations in the coastal city of Alexandria.

At least one of the youths was killed, Al Arabiya reported.

The clip shows a group of men, apparently supporters of Morsi, milling about on a roof and then proceeding to throw two youths off a structure on the roof. The first youth plummets head-first and is later seen splayed, motionless, on the concrete.

One of the activists then beats him with what appears to be a stick. Another bearded activist can be seen waving a black al-Qaeda flag.

Clashes between supporters of Morsi, who was ousted by the military last week, and their opponents killed dozens in Egypt over the weekend.

The youth who was confirmed to have been killed was identified as Hamada Badr.

“Do you know the teen that they killed and disfigured his body and threw from the fifth floor is only 19 and four days,” Mohammed Badr, the youth’s father, was quoted by Al Arabiya as saying.

Badr, the father said, was celebrating Morsi’s overthrow and lobbing stones at Muslim Brotherhood supporters, who retaliated and killed him.

“All he was guilty of was that he was on the roof of the building, celebrating the ouster of Morsi. But the Brotherhood waged a war against whoever was celebrating Morsi’s departure!” the father was quoted as saying.