A cycle patrol policeman has been "deliberately" run over in south London, the Metropolitan Police said.
The 39-year-old officer needed hospital treatment after being struck as he attempted to stop a car as it travelled through Peckham on Wednesday afternoon.
Detectives said he was "extremely fortunate" to have escaped without serious harm, although he sustained arm and leg injuries in the collision.
The officer, from the Met's Roads and Transport Policing Command (RTPC), was on patrol in Kennington Park Road, SE11 at around 2.45pm on Wednesday when he tried to stop a black Vauxhall Meriva.
A police spokesman said: "The vehicle appeared to deliberately run over the officer who had got off his bicycle. He was struck by the car and ended up on the bonnet before falling to the ground.
"The suspects drove off at speed in the direction of Peckham, via Camberwell Green Road.
"The 39-year-old male police constable was taken by the London Ambulance Service to a south London hospital with leg and arm injuries. He has since been discharged and is recovering at home."
Witnesses have been urged to come forward with any information that may help police trace the car, which was found abandoned less than a mile away around an hour later.
Detective Sergeant Ranjit Sekhon, from the RTPC, said: "I would urge anyone who witnessed either the collision or the car speeding away to contact us. I would also like to speak with anyone who saw two men running from the car after it was parked in Frederick Crescent.
"It is extremely fortunate that the officer, who was attempting a routine traffic stop, was not more seriously injured.
"It is important that we speak with as many people as possible to piece together the moments leading up to the collision."