Police are appealing for witnesses following a Carshalton fight where a man was reportedly run over by a car.

"At approximately 2.13pm this afternoon police were called to a fight in Denmark Gardens, Carshalton," a Met spokesman said.

"Four males were involved and it was alleged that one of the males was in possession of a knife. It was also alleged that one of the males had been run over by a vehicle.

"There followed a considerable police deployment to the scene. This included a police helicopter, police dogs and colleagues from the London Ambulance Service. Despite thorough searches and enquiries, we have been unable to locate any injured parties."

A large crime scene remains in place at this stage.