A second man has been arrested over the killing of a 60-year-old man who was stabbed in a street in south London.
The victim was found injured in Woodcroft Road, Thornton Heath, Croydon, at 21:30 GMT on Monday and died minutes later.
A 41-year-old was arrested on Boxing Day on suspicion of murder.
A 50-year-old man who was arrested at the scene on Monday remains in a stable condition in hospital after he became unwell, police said.
Detectives have asked for anyone with information to come forward.