A 42-year-old man has died following an incident on SH2 at Mangatawhiri near Pokeno.
Emergency services were called to the highway just after 2am.
Indications are that he was struck by a vehicle.
The exact cause of the crash will be investigated by the Counties Manukau Serious Crash Unit.
The road between SH1 and Pinnacle Rd will remain closed for another two hours.
Police Media Centre