One person has been hospitalised due to the crash in Greenhithe.
A police employee is fighting for their life in hospital after a crash that left another person dead in Auckland, Stuff understands.
The crash happened on State Highway 18, Upper Harbour Highway, near Greenhithe on the North Shore, on Monday morning.
Police said one person died at the scene and another, who was seriously injured, had been taken to hospital.
Stuff understands the injured person is an Auckland police worker, who was in a speed camera van at the time.
It is understood they are fighting for their life in hospital.
The crash, involving a black car and an SUV-type van, saw the car end up on its roof, near the Tauhinu Road off ramp.
St John Ambulance confirmed it was called to the incident shortly after 10am. A rapid-response unit, two managers and two ambulances were on-scene.
NZTA said the eastbound carriageway between Tauhinu Rd and Albany Highway would remain closed while an investigation was carried out by police.
Police advised motorists to take alternative routes or expect significant delays. The serious crash unit is in attendance.