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6 May 2010, 08:11 | Updated: 6 May 2010, 08:14
Police are still holding a number of teenagers after a 16 year old was stabbed to death in a park in South East London.
He was attacked just after 6pm last night at the Home Park Recreation Ground in Sydenham.
Police want anyone in the area at the time to contact them if they think they may have useful information.