A gun has been recovered from the scene of a fatal shooting in west London.
Officers were called to reports of a man with a firearm in a bank and bookmakers near Marloes Road in Kensington before the shooting on Saturday, the Metropolitan Police said.
Eyewitnesses saw a man being shot three times in a taxi before being “dragged out” and arrested in Kensington Road.
The Independent Office for Police Conduct has launched an investigation.
A non-police firearm has been recovered from the scene, the watchdog said on Sunday.
In a statement, it said: “At around 3.19pm yesterday afternoon (Saturday 12 December), police responded to reports of a man with a firearm on Marloes Road, W8.
“The man was seen to enter a car and armed police stopped the vehicle at the junction of Kensington Road and Palace Gate.
“Shots were fired and a man sustained gunshot wounds. The London Ambulance Service and London Air Ambulance were called but, despite the best efforts of the emergency services, he was pronounced dead at the scene.
“After being notified of the incident by the MPS (Metropolitan Police Service), we sent investigators to the scene and the post-incident procedure to start gathering evidence.
“What appears to be a non-police issue firearm has been recovered from the scene. Our thoughts are with everyone affected.”