Police are hunting these two masked motorists who violently knocked a motorbike rider to the ground during an attempted robbery.

Footage of the incident shows the 48-year-old motorcycle rider assaulted by a pair of attackers.

The clip first shows a red Honda motorbike cruise up behind a grey Fiat 500 vehicle at 11am yesterday (Thurs) in Sheffield.

The rider is then forced to swerve around it as the car screeches to a halt.

The Fiat driver then appears to deliberately turn into the motorbike before his balaclava-clad passenger jumps out and forces the man to the ground.

The motorcyclist then runs towards the car and forces its door open, but the driver, who is also masked, slams it shut again and then roars off into the distance.

A spokesperson for South Yorkshire Police said they believed the car to be stolen and displaying a false number plate.

They added that the victim was “understandably shaken” following the incident but did not suffer any physical injuries.

Officers are keen to hear from anyone who knows the whereabouts of the vehicle, has dash-cam footage or any information that can assist with their enquiries.