VIDEO: Bikers chase down Range Rover, attack driver

TERRIFYING video of a large group of motorcyclists chasing down a family in a car before smashing the car windows and attacking the driver has emerged on YouTube.

A helmet cameras catches most of the frightening chase through New York City, which gets worse after the car is stopped but then takes off, hitting several bikes in an attempt to get away.

It is unclear what started the dispute.

The bikers follow black Range Rover what appears to be for kilometres before stopping it again and approaching the driver's door.

Again the car gets away and the pursuit continues until the vehicle is stopped in traffic.

Two bikers then approach the car and start smashing it's windows with the driver, his wife and child inside.

Some newspapers are reporting the driver was slashed then in front of his family.