The victim had been involved in a fight on Ballards Lane, West Finchley. Police were scrambled to the scene at 04.05am on Friday where the man, whose age has not been confirmed, was found.
Paramedics and police tried to save him but he died at the scene.
A police cordon has been set up and forensics officers are trawling for clues.
Detectives are also carrying out door to door inquiries and searching for CCTV footage from around the crime scene. No arrests have been made.
Anyone with information about the incident is asked to call 101quoting CAD 879/27May. To remain anonymous call Crimestoppers on 0800 555 111.