Police are looking for a suspect seen on video attacking a man in the Atlantic Avenue Barclays Center subway station last week.
Authorities say the attack happened inside the Brooklyn station on the mezzanine of the B and Q lines on May 5 around 12:30 p.m.
Video appears to show the suspect coming up behind the victim and punching him in the side of the face.
Police say the 42-year-old victim was on the phone at the time. They say he tried to get away from his attacker and tried to throw punches back.
Officers say the suspect took off in the direction of the 4 and 5 lines
Police say the victim was taken to the hospital in stable condition with cuts near his eye and cheek.
Anyone with information is asked to call the Crime Stoppers hotline at 1-800-577-TIPS.