A subway rider contacted the police about a horrifying attack he/she witnessed on the 7 train last week, and now cops are looking for the assailant.

According to police, the incident took place on a Queens bound train on Sunday, May 5 at about 1 a.m. In the video, an unidentified man punches a victim and then leaves the train at 69th Street.

The NYPD, which received the video on Friday, describes the suspect as 5'9", 180s pounds with brown eyes and long black hair in a pony tail. He was wearing a dark t-shirt and blue jeans.

The suspect is described as a M/W-H, approximately 5'9", 180 lbs with brown eyes and long black hair with a pony tail. He was wearing a dark T-shirt and blue jeans.

Anyone with information in regards to this incident is asked to call Crime Stoppers at 1-800-577-TIPS (8477). The public can also submit their tips by logging onto the Crime Stoppers website at WWW.NYPDCRIMESTOPPERS.COM or by texting their tips to 274637 (CRIMES) then enter TIP577.