One person has died, and another has been seriously injured after two vehicles collided on State Highway 1 near Ohau Point this morning.
Police were notified of the crash at 9.38am on Wednesday.
St John sent an ambulance, helicopter and first response vehicle to the scene.
One patient in serious condition was airlifted to Christchurch Hospital.
The highway is blocked, and motorists should expect delays and plan for disruptions if travelling on that road.