A murder investigation has been launched after a teenager was stabbed to death in west London.
The victim, believed to be 18, was found injured in Uxbridge Road, Shepherd's Bush, on Wednesday night.
The Metropolitan Police said at about 21:20 BST, along with paramedics and the London Air Ambulance.
The teenager died at the scene a short time later.
Police are involved in the incident.
Det Insp Luke Wyllie said: "A young man's life has been tragically cut short.
"We are doing everything we can to apprehend those involved.
To create a clear picture of what took place and to work and protect those in the local community. "
A Section 60 order – which gives the power to stop and search people in a designated area – has been put in place at Shepherd's Bush and Notting Hill until Thursday afternoon.
Police are in the process of informing the teenager's next kin and a post-mortem examination.