Detectives are appealing for witnesses following a stabbing in Streatham.
Police were called by the London Ambulance Service (LAS) shortly after 23:00hrs on Tuesday, 3 May to reports of a man suffering stab injuries on Mount Nod Road, SW16.
Officers attended and the 21-year-old man was taken by LAS to a south London hospital where he remains in a critical condition.
At this stage, officers believe that the male suspect arrived at the scene of the assault in a silver Ford Focus. A number of people are believed to have been in the car with him.
There have been no arrests and enquiries continue.
Anyone with information is asked to contact Lambeth CID via 101 or alternatively, they can call Crimestoppers anonymously on 0800 555 111.