Detectives from the Metropolitan Police are appealing for witnesses and information after a teenager was stabbed in Ladbroke Grove.
The incident happened at approximately 9:30pm in Elgin Mews, W11 on Sunday (1 October).
The victim, an 18-year-old man, was stabbed after becoming involved in an altercation. London Ambulance Service attended and he was taken to a central London hospital where he remains in a critical condition.
His next of kin have been informed.
At this early stage, officers are appealing to anyone who was in the area and saw or heard anything that could assist the investigation.
Work continues to establish the motive for the stabbing.
Anyone with information is asked to contact Kensington and Chelsea CID via 101 or call Crimestoppers anonymously on 0800 555 111.