A 34-year-old man was stabbed to death during rush hour on a busy west London road.
Police were called to reports of a stabbing on High Street, Wealdstone, shortly before 19:00 GMT as commuters made their way home on Monday.
The man was rushed to hospital but died in the early hours of the morning. No arrests have been made.
Road closures are still in place as forensics teams continue to inspect the scene of the attack.