A teenager has been stabbed to death outside Upney Tube Station in east London.
The 17-year-old is thought to have been involved in a fight with a group of youths in Upney Lane, Barking.
Officers arrived at around 7.25pm last night, but the boy died shortly after being taken to King Georges Hospital.
Seven youths - six boys and a girl - have been arrested in connection with his murder and are being questioned at east London police stations.
Four of the boys have been released, but the others remain in custody.
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