Police are searching for a subway rider who allegedly groped a woman on the 4 train in Brooklyn earlier this month. 

The man, captured on the victim's cell phone camera, allegedly rubbed himself against the 22-year-old victim while riding the train in the area of Atlantic Avenue in Prospect Height at about 6:30 p.m. Monday, Aug. 5, police said. 

The suspect then ran off the train at Franklin Avenue.

Anyone with information is asked to contact Crime Stoppers at 800-577-TIPS or at nypdcrimestoppers.com.