Police were called at 9.15pm last night to reports the man had been found injured at Warrington Road in Croydon.
A spokesman said: “Two other people, believed to be in their late 20s, were also at the scene. They were arrested for handling stolen goods and taken to a south London police station.”
The man was taken to a south London hospital. The shooting is being investigated by Scotland Yard’s Trident operational command unit, which deals with gun crime in the black community.