A man was stabbed to death on a busy street in northwest London after an argument broke out inside a Post Office , witnesses have said.

Police launched a murder investigation after a 22-year-old died in hospital following a stabbing on High Road , Wembley , just before 1pm on Monday.

Paramedics from London Ambulance Service took the victim out of the shop and battled to save his life on the roadside in front of horrified shoppers.

He was then rushed to hospital, where he sadly died.

The man’s next of kin have been informed and are being supported by specialist officers.

A delivery driver who was working close to the scene said shoppers were running and taking cover.

He told the Metro: “It was terrifying, it was like they were running for their lives. Wembley is busy and the

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