A man was stabbed to death shortly after leaving a bar in south west London, police have said.
The victim, believed to be aged 20, left the venue on Garratt Lane at 01:05 BST and was found injured seven minutes later on Ellerton Road - writes bbc.com.
He was pronounced dead at 01:55 BST, the Met said.
A 21-year-old man has been arrested on suspicion of murder and is being held in custody at a west London police station.
Det Ch Insp Mark Cranwell said: "Sadly, another family has been left devastated with the tragic death of a young man from an act of violence."
It is the 44th murder investigation to have been launched in London this year - 31 of which have been as a result of fatal stabbings.
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