Police were called at 1302hrs on Thursday, 31 October to reports of a stabbing at Blossom Lane, Lavender Hill.
Officers and London Ambulance Service attended. A crime scene was established however no victim was present.
A man, aged 20s, self-presented at a north London hospital suffering from stab wounds a short while later.
He died in hospital at 14:21hrs.
A post-mortem examination will be scheduled in due course and we await formal identification.
Enquiries are underway to notify the victim’s next of kin.
At this early stage there have been no arrests.
Officers from North Area Command Unit investigate. Detectives from Specialist Crime have also been informed.
Road closures are in place in Lavender Hill near the crime scene. Motorists are advised to avoid the area.
Anyone who witnessed this incident or has information is asked to call police on 101 quoting 3432/31OCT.