A police watchdog has launched an investigation following the death of a motorcyclist who was hit by a Range Rover that did not stop for officers in southwest London.
The rider was killed on the A3 near Putney Heath in the early hours of Monday morning.
The 4x4 failed to stop for police at around 12.30pm, sparking a chase before it hit the motorbike which overturned, said the Independent Office for Police Conduct (IOPC).
The motorcyclist was declared dead at the scene and the driver of the Range Rover was not seriously hurt.
The IOPC said in a statement: "Our thoughts are with the family of the rider who died and all those who have been affected by this incident."
The Metropolitan Police said officers are working to identify the motorcyclist, and the driver of the Range Rover has been arrested.
A force spokesman said: "Officers immediately provided first aid to the rider. The London Fire Brigade and London Ambulance Service were called to the scene.
"Despite the efforts of officers and paramedics, the rider sadly died at the scene."
The force added the driver of the Range Rover has been arrested on suspicion of failing to stop for police, causing death by dangerous driving, theft of a motor vehicle, and driving under the influence of drugs.