Police were called to Jarrow Road, N17 at 7.21pm on Wednesday, 17 February after concerns were raised about an injured man who was unresponsive inside a vehicle at the location.
Officers attended with paramedics from the London Ambulance Service and the London Air Ambulance.
The man – believed to be in his 30s – was found with an injury consistent with having been stabbed.
Despite the best efforts of the emergency services, he was pronounced dead at the scene at 8pm.
His next of kin has been informed.
Homicide detectives from Specialist Crime have been informed and are leading the investigation.
A post mortem will be carried out in due course.
There have been no arrests.
Officers would like to hear from anyone who noticed anything unusual in the area around Jarrow Road on 17 February, or who knows anything about this incident.
Anyone with information should call 101 providing the reference CAD6202/17FEB.
Information can also be provided to Crimestoppers, anonymously, by calling 0800 555 111.