Four men have been arrested on suspicion of murder after the fatal stabbing of a teenager in Tulse Hill.
John Ogunjobi, 16, was knifed on Monday (November 12) before police found him collapsed on Greenleaf Close shortly before midnight.
He was pronounced dead at the scene before a post-mortem at Greenwich Mortuary found the cause of death to be a stab wound.
The men being questioned are aged 22, 20, 21 and 23 and they remain in custody.
DCI Vandenbergh said: "I am appealing to anyone who has information that could assist this investigation to come forward and speak to police.
"We believe the victim was attacked by a number of suspects and the altercation would have undoubtedly drawn the attention of those who were in the vicinity.
"Did you see or hear anything? If so, no matter how insignificant you think it may be, please call - your information could prove to be crucial."
Anyone with information is asked to contact 020 8721 4961.
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