Police are hoping the public can help identify a man accused of masturbating at a Brooklyn subway station—and then following a woman onto a train and groping her.

According to the NYPD, the incident occurred this past Friday, August 7th, at 6:20 p.m., during the evening rush hour. A 51-year-old woman was on the B/Q platform at the Atlantic Avenue station when she saw the suspect "masturbate in front of her. The victim walked away and boarded the train, with the suspect in tow. The suspect then grabbed the victim's buttocks. Once on the train, the victim took a photo of the suspect."

Police released the photograph and ask anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 800-577-TIPS. The public can also submit their tips by logging onto the Crime Stoppers Website at WWW.NYPDCRIMESTOPPERS.COM or texting their tips to 274637(CRIMES) then enter TIP577.

You can also report subway pervert incidents on the MTA's website—there's a place where you can submit photos, too.