“Motorists have been asked to avoid the area,” a statement from police said.
Around an hour later, a truck rolled down a bank near Two Mile Creek Bridge on the Kawatiri-Murchison Highway and required an occupant to be rescued.
Three fire crews, including a specialist rescue team from Nelson were called to the rural crash site to help extricate the passenger.
Police said the highway was closed at Rait Rd and east of Two Mile Bridge to traffic as emergency services and contractors attend a truck crash.
“Contractors have closed the road to allow the crash scene to be investigated and cleared,” a statement said.
“The closure is expected to last for some time, and there is no estimate for when the highway will reopen.”
As there are no local detours, people travelling between Nelson and Murchison and the West Coast should avoid the area, police said, use an alternative route, or delay their travel until the highway is reopened.