Palmerston North police are searching for the occupants of two vehicles who may have witnessed a fatal shooting.
The body of Jamie Martin Faulkner, 32, was found with a gunshot wound in the grounds of a block of flats in Heretaunga St at about 4pm on Friday.
Detective Senior Sergeant Craig Sheridan says police want to speak to the occupants of a white builder's van and a red car seen parked near the scene.
Police have spoken to a man believed to have been involved in an altercation with Mr Faulkner before the fatal shooting, and have been trying to work out whether the incident played any part in the death.
Forensic scientists are examining a flat close to where Mr Faulkner's the body was found.