A man has died following a stabbing near Brixton Underground Station in south London.
Officers were called to the scene at around 8.18pm on Wednesday to reports of an assault and found a man aged in his early 20s suffering from a stab wound.
Paramedics from the London Ambulance Service and London Air Ambulance attended but were unable to save the man, who was pronounced dead at around 8.45pm.
His next of kin has been informed and are being supported by officers. Formal identification has not yet taken place.
The Met said a man was arrested nearby on suspicion of causing grievous bodily harm.