Underdown told the Herald fire crews were setting up a landing zone for helicopters near the scene.
“We’re waiting for helicopters to come, and then we’ll probably do the extrication in conjunction with ambulance,” he said.
Separate Carterton two-vehicle crash also closes SH2
Meanwhile, emergency services are also attending another two-vehicle crash which has closed a section of SH2 in West Taratahi near Carterton.
Police said they were called to the scene at about 12pm.
“Initial indications suggest one person has serious injuries.”
Motorists are advised to avoid the area if possible.
And police say a vehicle has left the road and crashed into a ditch this afternoon on the South Island’s West Coast.
The accident happened on the Otira Highway between Lake Brunner Rd and Old Christchurch Rd.
There are not thought to be any serious injuries, police said.
Sign up to The Daily H, a free newsletter curated by our editors and delivered straight to your inbox every weekday.
