A 24-year-old woman has been killed in a double shooting.
Scotland Yard said officers were called after reports of gunshots in Kilburn, north west London.
Another woman, also 24, was shot but not seriously injured in the incident in the early hours of Saturday morning.
A Metropolitan Police spokesman said: "Detectives are investigating the fatal shooting of a 24-year-old woman in Kilburn. Officers were called at 4.20am on Saturday, 24 August, to reports of shots fired in Kilburn High Road.
"Police and London Ambulance Service attended the scene to find two women suffering from gunshot injuries. Both were taken to London hospitals. A 24-year-old woman was pronounced dead later on Saturday morning."
Scotland Yard said they believe they know the identity of the woman who was killed, and next of kin have been informed, but she has not been formally identified.
A post-mortem examination will be arranged in due course.
Officers from Operation Trident - which investigates gang crime and shootings in London - are at the scene and the death will be investigated by detectives from the Homicide and Major Crime Command.
Anyone with information was asked to called the police on 101 or call Crimestoppers anonymously on 0800 555 111.
Local road closures remain in place. No arrests have been made.