WARNING - DISTRESSING AND GRAPHIC CONTENT: A shocking video showing more than a dozen men in Sydney's west bashing a young man unconscious and kicking him in the head as he lies limp on the ground has been posted on social media.

The video posted on Facebook on Wednesday titled "Welcome to Mt Druitt" purports to show at least a dozen men and teens bashing one person to the ground where they continue to beat him.

The victim appears to be young, possibly not even 18 years old.

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View photos The victim, who appears to be in his teens, was set upon by several men and teenagers. Source: Facebook/elise Itula-Schuster More





He loses consciousness and the mob continues to beat him, kicking him in the head and smashing him with chairs.

Several times by several people his limp body is kicked and stomped.

When the crowd disperses, one man comes up to the lay his boot in again, screaming at the passed out victim: "Greater West motherf***ker."

He kicks him in the head again and runs away.

Another man then approaches and removes something from the victim's pocket, possibly a phone or wallet.

He is kicked again in the head before the mob makes their way down the street.

View photos One man took something from the victim's pocket after the beating. Source: Facebook/Felise Itula-Schuster More

One man intervenes to keep the crowd away, saying "Leave him, leave him," but he does not stop another person in the mob running up and slamming a fist into the victim.

It is not clear what sparked the mob's brutal bashing or the victim's condition.

NSW Police has confirmed to Yahoo7 News that it is aware of the video and is reviewing the footage to identify those involved.

Police also believe the assault may have happened some months ago.

NSW Ambulance has also been contacted.

The vast majority of comments on the Facebook post express people's disgust with the mob bashing.

"Painful to watch. I feel sick in the stomach," one person wrote.

"It's gronks like these boys that give Mt Druitt a bad name!! How sad there's a group on 1? What p***s!" said another.

Anyone with information is encouraged to call Crime Stoppers 1300 333 000 or use the Crime Stoppers online reporting page.