Officers said they found the man with stab injuries in Kentish Town, north-west London, after being called at about 8.30pm on Monday. He was pronounced dead at the scene near the Grafton Road junction with Vicars Road, despite the efforts of medics. No arrests have been made.
Formal identification and a post-mortem examination are yet to take place, but the victim’s next-of-kin have been informed.
Camden police have issued a section 60 order in the area allowing officers to stop and search people.
They said on Twitter: “Following a fatal stabbing in Kentish Town, Gospel Oak a section 60 order is in place for the NW1 and NW5 areas.
“Police have the power to stop and search individuals for offensive weapons.”
The section 60 began at 10.15pm last night and will end at 6.00am this morning.
Anyone with information can contact police on 101 or Crimestoppers anonymously on 0800 555111.
The stabbing comes just days four people were hurt in random attacks in Edmonton, North London.
A woman and three men were knifed from behind while walking alone.
A 45-year-old woman, who was stabbed in the back, and a 23-year-old man are in a critical condition in hospital.
The Metropolitan Police said it remains a live investigation and said they are pursuing all lines of inquiry, as they advised members of the public to remain vigilant.
Police believe a single male suspect was acting alone and that “mental health issues may be a factor”.
Two men have been arrested following the four potentially linked stabbings in the Edmonton area.