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1 June 2014, 12:11
Police were called to Wells Park Road around 8:30pm last night.
They found an 18-year-old suffering from stab wounds.
He was pronouned dead at the scene.
A 17-year-old was also stabbed - he remains in hospital in a stable condition.
Four teenagers have been arrested and are in custody in various south London police stations.
Police are asking anyone with any information to come forward.