An off-duty NYPD officer was injured Tuesday night, when he was attacked by a biker on a green motorcycle in a violent assault on a quiet Upper East Side block, police say — in what appears to be was a case of road rage.

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It was around 7:00 pm, when police say the victim, a 52-year-old off-duty cop out walking his dog, got into an argument with the biker on East 90th Street between First and Second Avenues, after he was nearly hit by the motorcycle, which was driving recklessly, police say.
Investigators say the off-duty officer told the biker to slow down, that’s when the suspect got off his motorcycle and pummeled the cop with his fists, punching him in the face multiple times, causing him to fall and break his ankle and leaving him with a cut on his ear.
The off-duty officer was taken by paramedics to Weill Cornell Medical Center for treatment, officials say.

Two police officers were spotted stationed at the scene of the crime, in front of 328 East 90th Street, and were seen pointing out surveillance cameras on nearby buildings that may have captured the violent vehicular assault on video.
NYPD officers flooded the corner of East 90th and First Avenue after a mobilization was called and included specialized units like the Strategic Response Group and the Emergency Services Unit.

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Four members of the detective squad from the 19th Precinct — which serves the Upper East Side — were also spotted at the scene Tuesday night.
Investigators say the biker managed to escape from the scene of the crime, however, surveillance images of the suspect were released Wednesday morning.

The suspect is described by police as a man is in his mid 30s to mid 40s, standing 5’8″ tall and weighing 200 pounds. He was last seen wearing a gray hoodie, black pants and a helmet.
If you saw anything or have any information that could help police, you’re asked to call the NYPD’s Crime Stoppers Hotline at 1-800-577-8477.