A murder probe has been launched after a young man who was repeatedly stabbed in a south London street died in hospital.
Bjorn Brown, 23, was attacked by two men in Thornton Heath, Croydon, on Wednesday evening, police said.
He was stabbed repeatedly in Kelling Gardens and attempted to cycle away from the scene of the attack before he collapsed.
A motorist who was driving past found Mr Brown, from South Norwood, lying in nearby Bensham Lane with multiple stab wounds.
The driver flagged down paramedics in a passing ambulance who took the victim to hospital.
Scotland Yard said detectives had launched a murder investigation after Mr Brown died at a south London hospital on Monday.
Police said his next of kin are aware and a post-mortem would be scheduled in due course.
Detectives from the Met's Homicide and Major Crime Command (HMCC) believe Mr Brown was attacked by two men who then ran along Bensham Lane towards Cameron Road.
They are appealing to anyone who witnessed the incident or has information about the two men who are believed to have fled the scene.
The first suspect is described as a black man, of a heavy build and approximately 5ft 6ins tall. He wore a dark "puffa" style jacket and dark trousers.
The second suspect is described as a black man, of a slim or average build and approximately 5ft 5ins tall. He also wore a dark "puffa" style jacket and dark trousers.
There have been no arrests and enquiries continue.
Detective Chief Inspector Cliff Lyons of the HMCC, who is leading the investigation, urged witnesses to come forward and thanked the passer-by who stopped to help.
Chief Superintendent Jeff Boothe, Borough commander for Croydon, said: "I am saddened to hear that our borough has suffered another tragic incident with the death of a young man stabbed in Thornton Heath last week, an my thoughts are with his family.
"The Homicide and Major Crime Command are leading that investigation now and we are supporting them. I would urge anyone in our communities who witnessed this incident or who has any information about it to contact the incident room.”
He added that he was working to keep officers visible in the Croydon borough after the fatal stabbing of Mr Brown and the recent alleged hate crime attack on asylum seeker Reker Ahmed.
"This is another violent incident impacting on our communities, so close to the recent attack in Shrublands, but there is nothing to link the two events,” he said.
"I am continuing to work to keep officers visible in the affected communities, and ask that anyone concerned with recent events to talk to officers. It is only together that we can tackle those who seek to be involved in violent offending."
Anyone who witnessed the stabbing or has any information is asked to contact the incident room on 0208 761 4961 or anonymously on Crimestoppers on 0800 555 111 or via Twitter @MetCC.