Four men have been arrested after the attack in southwest London last night.

Metropolitan Police officers and the ambulance service were called to the station at 11.53pm where a man in his 20s was pronounced dead at the scene.

Police said he was found with a "serious injury consistent with being stabbed".

Detective Chief Inspector Sam Blackburn said: "This is a senseless act of violence which has seen the tragic death of a young man. This investigation remains in the early stages and the station will remain closed while we continue our enquiries."