Shocking video has emerged of two men being thrown off a building ledge in what activists say was violence levelled at opponents of ousted Egyptian president Mohamed Morsi.
The video, allegedly filmed on a mobile phone, emerged over the weekend and shows the brutal incident in Alexandria.
The men can be seen huddled on a ledge on the building's roof.
It is reported they were attempting to flee from supporters of Morsi's Muslim Brotherhood who had reportedly chased them.
The video then shows the angry mob closing in on the young men, pelting them with stones and eventually climbing the ledge.
The first of the men is thrown from the building and then beaten by others as he lay on the ground.
One of the men died.
He was identified as Hamada Badr.
Activists said he was celebrating the removal of Mr Morsi when he ran into a group of Muslin Brotherhood supporters, local news sites report.
“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, father of the killed teen, told el-Watan News in an interview published Saturday.
“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!” Badr said.
The video showed an Islamist carrying a black and white Al-Qaeda flag around the building where Badr’s son was besieged.