Police have released surveillance video of a suspect wanted in connection with a fatal train brawl in Williamsburg.

According to cops, the man pushed 20-year-old Joshua Basin, of Queens, to his death on the train tracks Friday at the Bedford Avenue stop. They say both men were riding the L train when they got into a verbal argument that escalated once they got off.

Investigators say Basin was pushed onto the tracks and struck by a train. He was later pronounced dead at a hospital.

The suspect is described as 30-35 years old with a thin build, light complexion, dirty blonde hair and marks on the right side of his face. Anyone with information should call Crime Stoppers at 1-800-577-TIPS.