A murder investigation has been launched after a teenager was found stabbed in south London.
Police and the ambulance service were called to Prentis Road in Streatham at about 16:00 BST according to the Metropolitan Police.
A youth, believed to be in his late teens, was found with a knife wound to his chest. He was pronounced dead at hospital 30 minutes later.
Four males and three females have been arrested on suspicion of various offences, detectives said.

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