At least one person has sustained serious injuries after a loaded campervan and a small truck collided in the Tasman region.
Emergency services were called to the crash on State Highway 6 - the Four Rivers Highway - just west of Murchison at 8.30pm last night.
Six people, believed to be from Argentina, were in the campervan. Two people were in the truck.
Police said "some sustained serious injuries".
The Nelson Marlborough Rescue helicopter made two trips to the incident, flying four patients in total to Nelson Hospital.