Rijkaard Salu Siafa was pronounced dead at the scene in Fellmongers Yard, Croydon, after officers were called just after 6pm on Friday.

A 20-year-old man arrested nearby on suspicion of murder remains in custody.

Metropolitan Police Detective Chief Inspector Sarah Lee said: "Our thoughts and deepest condolences are with Rijkaard's family and friends who are coming to terms with his death following this shocking incident.

"This loss has ripped an irreparable hole in their family and I would ask their privacy is respected at this difficult time."

Members of the public tried to give first aid to the victim before Met officers, London Ambulance Service and London's Air Ambulance arrived.

"I would also like to thank those members of the public who rushed help Rijkaard in the immediate aftermath," said DCI Lee.

"If you saw events unfold but have yet to contact police, then I would ask you do so immediately.

"Local residents will continue to see an increased police presence around the area of Fellmongers Yard - if you have any concerns, please speak to one of them."