The NYPD is asking for help tracking down the suspect accused of exposing himself to a teenager on the subway in Bed-Stuy.

According to police, a 15-year-old girl was a northbound M train on Dec. 11 near the Flushing Avenue station when the suspect exposed himself to her and performed some sort of lewd act

The teen was not physically injured.

Anyone who recognizes the suspect is asked to call police.