Police are asking for help tracking down a man linked to allegedly sexually assaulting a teenaged girl in Crown Heights.

The NYPD says the man is accused of sexually assaulting the 15-year-old girl at a train station on Oct. 16 at around 8 a.m. The teen was on board a northbound 3 train traveling toward the Franklin Avenue subway station when the suspect grabbed the victim's thighs, arms and private area.

The victim fled the train at Franklin Avenue and the suspect stayed on the train.

No injuries were reported.