Three young girls spat at a Jewish man in Williamsburg before one of them bit a cop who confronted them on Thursday night, police and sources said.

The trio, a 13-year-old and two girls younger than her, threw garbage and spit at the man during an argument near Broadway and Gerry Street at about 7:30 p.m., according to cops and sources.

Police were called and located the girls about three blocks away on Humboldt Street near Boerum Street, authorities said.

When confronted by the officers, the 13-year-old girl bit one of them, sources said. She was taken into custody, police said, while the other two girls were not.

The officer suffered minor injuries, police said.