Whangarei police have released CCTV images of two vehicles that are believed to be connected to the death of 37-year-old John Henry Harris.
Harris was dropped off in a critical condition at the Whangarei Ambulance Station and later died.
Police are asking the public to come forward if they have any relevant information or have seen either of the two vehicles.
The first car is a red 2007 Holden Commodore, registration JCS248. Police believe the car was towed from an address on Hassard Street in the early hours of Tuesday morning.
The second vehicle of interest is a black 2011 Holden Commodore, registration FZC162. This vehicle was found on fire at Lovell Road, in Ruatangata just after 12.00pm on Tuesday afternoon.
Scene examinations at two properties of interest continue.
A tangi for Mr Harris is to take place on Saturday and police are expecting a large number of gang members from across the North Island to attend.
Anyone with information can contact Whangarei Police on 09 430 4500. Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.