Police are searching for the suspect who beat up a fellow subway rider in a brutal attack at a subway stop in New York City.Police say the attacker approached the 22-year-old male victim from behind and punched him several times in the face and body.He knocked the victim to the floor where he also kicked him. The suspect then fled the scene in an unknown direction.The victim was treated at the scene by EMS for bruising and swelling to his face as well as two chipped teeth.