CLEVELAND (AP) — A group of teenagers beat a homeless man to death as passers-by slowed to watch the attack, some of which was caught on videotape, police said.

Anthony Waters, 42, suffered a lacerated spleen and broken ribs during the attack Wednesday night and died at a hospital, police said.

"The pack mentality going on in the city of Cleveland must end," police Commander Calvin Williams said Thursday at a news conference at which he urged the attackers to come forward.

Portions of the attack were caught on a surveillance camera outside G&M Towing Co. on the city's east side. Police said the videotape shows passing cars slowing to watch three teens attack Waters until he staggered into the parking lot, where he was assisted by G&M employees.

The attackers, who appeared to be between ages 14 and 17, robbed Waters of a music player and headphones, police said. No arrests have been made.