They would not say how many people they were seeking in relation to the incident, if any arrests had been made or if the vehicle had been found.
This comes after a Health New Zealand employee last night said a man who was with the victim said his friend had been beaten up and when he tried to escape, the group ran him down.
"We understand a group of people were present at the scene prior to this man's death and welcome any information you may have that will help us understand what happened."
Anyone with information should contact police 105, event number P051302605; Crime Stoppers 0800 555 111 or online via www.crimestoppers-nz.org