A senior Egyptian security official says authorities are probing allegations of police abuse after a video circulated online showing three policemen taunting a nearly naked corpse.

Maj. Gen. Mahmoud Yousseri, police chief of the Nile Delta governorate of Qalubiya, said on Thursday that the video is authentic. He identified the slain man as a fugitive named Mohammed Sultan, who escaped after being detained on charges of murder and theft.

The video, which surfaced earlier this week, shows policemen laughing and snapping mobile phone pictures of the body, which is naked except for bloody underwear. At one point they place a lit cigarette into the dead man's bloodied mouth.