Search: Purser House shooting
Detectives are hunting a gunman after a teenager was shot dead outside a block of flats.
The 18-year-old, named by sources as Nana Darko-Frempong, was blasted four times before his attackers sped away in a car from the estate in Tulse Hill, south London.
Murder police are investigating claims that the shooting, which occurred on Monday night, was part of a gangland hit.
The victim - the seventh teenager killed in the capital this year - died at the scene after being set upon in the grounds of Purser House at 11pm. He is believed to have lived on the estate for about 10 years but has not yet been named by police.
Scotland Yard's Operation Trident unit, which investigates gun crime in London's black communities, is investigating.
Detective Chief Inspector Gordon Allison appealed for witnesses to come forward.
He said: "We would urge anyone who may have seen or heard anything between the hours of 9.30pm and 11pm, or seen a suspicious vehicle in the area at the time of this murder, to contact us and assist us in this investigation."
Officers, who are yet to make an arrest, said paramedics were unable to resuscitate the teenager at the scene.
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Chuka Umunna, the Labour MP for Streatham, said he had been in "close contact" with police over the incident, and said the local community on the estate had been "rocked to the core".
The death is the third killing in south London within the last fortnight. Alper Pasha, 43, from Bermondsey, died in hospital after being attacked outside a KFC fast food outlet in Coldharbour Lane, Brixton, and Sadiq Adebiyi, 25, was shot dead outside the Stockwell Gardens estate.
