Police are searching for a suspect they say assaulted an elderly man on the L train.

Police say an unidentified individual approached a 67-year-old male victim as it was pulling into the Graham Avenue subway station and punched the victim in the face.

The elderly man suffered an injury to the inside of his lip, a chipped tooth, and swelling and burning to his left cheek.

The suspect is said to be about 35 to 40-years-old, and was last seen wearing a dark blue coat, dark blue ski cap, dark jeans, and white headphones.

Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS.