A 43-year-old man has died following a fight in Taihape's Thrush St in the early hours of Saturday morning.
Police were called to a disorder incident at 12.30am, and Taihape firefighters were also present.
They found a man with critical injuries and the New Zealand Herald reports he died while being taken to a nearby airbase to be airlifted to hospital.
A second man has been taken into custody and is helping police with their inquiries.
Whanganui Police CIB are in Taihape today investigating, Whanganui Sergeant Kevin Smith said.