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Police were called to Woolwich Arsenal station, which serves the Docklands Light Railway network, at around 7pm.

An 18-year-old was taken to hospital after suffering a stab wound. His condition is not yet known.

The latest incident comes just hours after a teenager was arrested after two teenage girls were stabbed in north London.

The victims were rushed to hospital after being attacked at around 5.30pm in West Kensington, police said.