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NYPD police stand guard on the West Side Highway as protesters block traffic after the jury verdict in the death of Eric Garner, in New York, Dec. 3, 2014. REUTERS/Shannon Stapleton

Two New York Police Department officers repeatedly slammed a man's head into the ground while trying to handcuff him during a traffic stop on the morning of New Year's Eve. Part of the encounter in the city's Bronx borough was recorded on video from a bus as the officers could be seen taking turns delivering blows to the restrained man. It was the latest in a string of police brutality allegations against the city's police force.

The video was first posted to the Facebook page of a person named Alexis Jasmin who acknowledged the unidentified victim said "a few choice words." However, James added, that was no reason for such a vicious beatdown.

"As im riding to the hair salon just now smfh ! This man was already in his car and the police were in the van getting ready to pull off. Granted the man did stick his head out the window and say a few choice words. But please tell me why the cops got out the van, snatched him out of his car and proceeded to do this to him," James wrote in text that accompanied the video posted Saturday morning. "Please explain to me why the officer kept bashing his face like that . This is exactly why i hate the police . His hands were already tied and he kept hitting the man in the face until bloody. RIDICULOUS!!"

Voices can be heard while the video was being recorded sounding incredulous, saying things like "Why are they hitting him?" and "his [expletive] face is bleeding."

"The matter is under internal review," a police spokesperson told the Gothamist. However, the NYPD would not provide key information, such as the name of the person who was beaten, the nature of the traffic stop and if the incident resulted in an arrest.

The NYPD has been under scrutiny over its use of force in recent years. A similar incident unfolded in the Bronx this past summer, when a plainclothes officer repeatedly hit a restrained suspect with a fist and knee. That incident was also filmed by a bystander.

The city's police department settled a brutality suit just last month, agreeing to pay more than $600,000 to a man who was beaten by NYPD officers in 2012, Reuters reported.

Other recent instances of alleged police brutality include the 2014 choking death of Eric Garner, who was killed by police after he resisted being arrested for selling loose, untaxed cigarettes on a public street.