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Last Updated: Saturday May 24 2008 12:59 GMT

Teenage actor killed in stabbing

People lay flowers at the scene in Sidcup, Kent, where Robert Knox was stabbed

A teenage actor who had a small role in the next Harry Potter film has died after being stabbed.

Eighteen-year-old Robert Knox played Ravenclaw student Marcus Belby in The Half-Blood Prince.

He died after an incident outside a bar in the early hours of Saturday morning, in Sidcup in south-east England.

Robert died after he was taken to hospital. Police have confirmed that a 21-year-old man has been arrested on suspicion of murder.

Warner Bros, the company behind the Potter films, said: "We are all shocked and saddened by this news and at this time our sympathies are with his family."