Police are responding to reports a vehicle has gone over a bank at the summit of Upper Hutt's Remutaka Hill.
A life flight helicopter from Wellington and Wellington Free Ambulance were called to the scene.
Police were called at 9.15am, they said.
One patient has been taken to Hutt Hospital via road in moderate condition, Wellington Free Ambulance confirmed to 1 NEWS.
The patient is believed to be the sole occupant of the vehicle.