A 14-year-old boy was in a stable condition in a hospital after being shot in the chest, police said today.
Scotland Yard said the boy had been taken to a north west London hospital on Tuesday afternoon by two unidentified males.
He was later transferred to a central London hospital.
Police believe the boy was shot in Sudbury Heights Avenue in Greenford, north west London on Tuesday. They appealed for witnesses to come forward.
The shooting in being handled by Scotland Yard's Operation Trident team, which investigates gun crime in London's black community.
More than 70 teenagers have been killed in violence in Britain this year, according to research conducted by the BBC.