Police arrested three teenagers Saturday in the beating of a homeless man in a park.

The teens, all 15-year-old Fort Lauderdale residents, were charged with aggravated battery with a deadly weapon, police said in a statement.

The charges stem from an attack on William Teeters, 44, who was left bleeding and bruised in the park Wednesday night, police said. He was later treated at a hospital.

Authorities identified the three teens and another boy from a surveillance video that showed them within a quarter-mile of the park 10 minutes before the attack, police said. Authorities had said the boys were considered "persons of interest" because they match Teeters' description of his attackers. Police said Saturday the fourth person had been identified but would not be charged.

Teeters was attacked near the site where another homeless man, Norris Gaynor, 45, was beaten to death by a group of teens in January. Three suspects in that case are awaiting trial.