POLICE officer somersaulted high into the air, miraculously escaping serious injury, after being hit by a car travelling 121km/h last night.

The officer was struck by the car while conducting speed enforcement duties on Roberts Rd, Greenacre, in Sydney's south-west, about 8.30pm last night.

The senior constable, wearing an approved reflective vest, held out a "Stop Police" sign and signalled for the driver to pull over with a torch.

The car instead sped up to overtake a taxi and struck the officer.

CCTV shows the officer attempting to flag down a vehicle before he was hit. Picture: Channel Seven
CCTV shows the officer attempting to flag down a vehicle before he was hit. Picture: Channel Seven

Footage of the incident captured on CCTV shows the officer attempting to flag down a vehicle before he was hit by the Mazda 3 hatchback.

The footage shows the senior constable being hit by the car and quickly composes himself before walking off the road.

He suffered injuries to his hands and legs and was taken to Concord Hospital in a stable condition.

The driver did not stop and was last seen travelling down Roberts Rd.

Police are looking for the driver and the vehicle, which caused damage to the nearside wing mirror and possibly the bonnet.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000.

News Corp Australia

WATCH: Maranoa residents sight strange object through the sky

Premium Content WATCH: Maranoa residents sight strange object through the...

Southwest Queensland residents have sighted the odd bright object travelling across...

Humungous grants for Darling Downs and southwest community groups

Premium Content Humungous grants for Darling Downs and southwest community...

Hundreds of thousands of dollars are being spent on community groups and councils...

Identities of men who allegedly held up Maranoa servo revealed

Premium Content Identities of men who allegedly held up Maranoa servo...

The two men who have been charged with allegedly robbing a Warrego Highway servo...