Officers were called to Samos Road in Anerley at 12.30pm on Sunday and are working to establish the victim's identity.
Detectives have begun a murder investigation after a man in his early 20s was stabbed to death in southeast London.
Officers were called to Samos Road in Anerley at 12.30pm on Sunday, along with an ambulance and London's air ambulance.
The victim, believed to be 22, was pronounced dead at the scene at about 1pm. A post mortem is due to take place.
Cordons were put up and police say an "urgent" investigation is under way.
Efforts are being made to establish the victim's identity and inform his next of kin.
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There are no arrests as yet.
:: Anyone with information should call 101, quoting CAD 3251/04 Nov. Alternatively they can call Crimestoppers, anonymously, on 0800 555 111.