NEW YORK (CBSNewYork) – An elderly man in the Bronx didn’t get knocked down easily after being unexpectedly beat down from behind.

Police say a seemingly random attack happened on Courtland Avenue last week in the Melrose section of the Bronx, according to CBS2’s Clark Fouraker.

Surveillance video shows an 81-year-old man getting knocked down, but police say say he got up and chased his attackers away.

Police say the victim was minding his own business when suddenly a suspect comes into the video frame and sucker punches the man in the back of the head.

The man falls onto the pavement in between two cars parked on the curb.

They say the elderly man suffered pain and bruising on his face and went to Lincoln Hospital in stable condition after chasing his attacker.

bronxvideo 81 Year Old Punched In Face, Chases Attacker In The Bronx

Police say a suspect shown in a surveillance video punched an 81-year-old man in the Melrone section of The Bronx on July 15, 2018. (credit: NYPD)

Police have release another clip they say is a head on shot of the suspect walking along the sidewalk with another person.

The suspect is shown in the video on the left, with a flashing sign lighting his face before running off.

Police are asking for the publics help in finding the man who threw the punch.