A man was brutally beaten by two large men on the streets of New York City, but no one attempted to intervene because they said there was no stopping the assailants.

An unidentified 24-year-old man was mercilessly attacked by two men who chased him through the streets of downtown Manhattan around 3am on Friday, according to police.

As the larger males repeatedly kicked and punched the victim, passerby did nothing to stop the blows, in the disturbing event captured on surveillance video.

One witness said although what happened was horrific, he was scared to step in because the men 'were big guys' and there wasn't going to be 'any stopping them'.

An unidentified 24-year-old man was mercilessly attacked by two men who chased him through the streets of downtown Manhattan around 3am on Friday. They kicked, stomped and punched their victim before fleeing in a livery vehicle

Captured by a shop's surveillance's video on Orchard Street, in the Lower East Side, the two attackers savagely kick the victim in the head, face and body, reported PIX 11.

Several people walked by but none stepped in to rescue the helpless man on the ground from the crushing blows.

Only once did the men flee the scene in a livery vehicle, did witnesses intervene and waited with the injured man until medical assistance arrived, according to New York police.

A witness said to CBS2: 'It was really gruesome and hard to watch.

Several passerby witnessed the brutal assault but no one intervened to help the man. A witness said he was scared to step in because the men 'were big guys' and there wasn't going to be 'any stopping them'

'And they wouldn’t stop — just going on and on and on, like, and that’s when I was yelling: "Stop! Stop! He’s down! Just leave it! Go!"

'I mean, they were big guys. Like, I myself couldn’t stop them. I don’t think there was any stopping them.'

Another witness said to ABC7: 'It looked bad. It looked real bad. Because once the ambulance came, there was just blood all over the street. It was bad.'

The victim was transported to Bellevue Hospital with serious injuries.

Police are looking for the suspects and anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS (8477).