A post-mortem will be carried out today on the man who died of his injuries in Whangarei's St John ambulance station.
The man, 37, was taken to the St John base in Kensington early yesterday morning by friends but died soon after.
Police are treating the death as a homicide, and have not disclosed the man's identity or injuries.
However, friends of the family told RNZ he was shot, and that the attack was gang-related.
It is the second violent death in Whangarei in two weeks.
Moses Mahanga, a 25-year-old Headhunters associate, was fatally shot in a car in the city two weeks ago.
Police have not said if they believed the two homicides were related.
Whangarei mayor Sheryl Mai said yesterday it was alarming the city had seen two homicides in two weeks.
She said the police had assured her there was no risk to the public.