Police say four teenagers have been arrested in a bizarre assault and robbery that began with one of them dancing in his underwear behind a Yonkers fast-food restaurant counter while another videotaped him.

Police Capt. Daniel Daly says the suspects told investigators they were "only clowning around" at the Central Park Avenue McDonald's on Wednesday, but the violence was no joke.

Police say the teens punched and kicked a manager when he tried to stop them, and then beat up another employee who tried to intervene. Police say the suspects also took a worker's wallet.

One of the teens was arrested on robbery and assault charges, and the rest on assault charges.

A message left at the McDonald's early Friday wasn't immediately returned.