A man has been stabbed to death at Hillingdon Underground Station.
British Transport Police say they were called to a serious assault on a platform just before 4.00pm.
A spokesperson for British Transport Police said: “Officers quickly attended alongside colleagues from the London Ambulance Service and air ambulance, and a man was found with a serious injury, consistent with being stabbed.
“Despite the best efforts of medical staff he was very sadly pronounced dead at the scene.
“His family have been informed and are being supported by specially trained family liaison officers.”
The victim was pronounced dead at the scene.
No arrests have yet been made.