A man in his twenties has been critically injured after falling out of a moving taxi in Harrow.
The 26-year-old suffered life-threatening head injuries in the incident, which occured in Alexandra Avenue at the junction with Clitheroe Avenue, at 1.05am on Sunday (September 28).
London Ambulance Service paramedics treated the man at the scene and he was taken to a central London hospital where his condition is critical. Next of kin have been informed.
At this early stage, police believe he was part of a group of men and women who were close to a silver Renault Traffic taxi parked outside Dominos Pizza on Alexandra Avenue. As the taxi subsequently drove away the driver realised the rear tailgate was open and a man was rolling on the road behind the vehicle.
At this stage it is not known how the man came to be in the taxi and officers are keen to make contact with the other members of the man's group who had left the scene by the time officers arrived.
Detective Sergeant Chris Osborne, of the Serious Collision Investigation Unit, said: "We know this man was with a group of what appeared to be friends or colleagues moments before he was injured. He is now in hospital in a critical condition and I would urge anyone with information to come forward so that we can establish the precise events."
Anyone who can assist the investigation should call 020 8991 9555. To remain anonymous call Crimestoppers on 0800 555 111.
