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A major car accident north of Kaikoura has claimed three lives and injured four others, two critically.
The accident happened just after 3pm involving a car and a truck.
An eye witness at the scene said: "It looks like a really big car accident."
He said the accident occurred north of Hapuku and south of Mangamauna on a section of road not affected by earthquake repair works.
While a straight stretch of road, the local man said it wasn't known for speeding or posing motorists other dangers.
Police said the accident happened about 3.15pm and involved two vehicles.
Initial reports suggested "multiple people" with "serious injuries".
"The road is blocked and motorists are advised to avoid the area if possible."
State Highway 1 was closed and traffic was building up while fire and emergency services worked. The Canterbury West Coast Air Rescue Helicopter had also landed.
A Fire & Emergency NZ spokesman said the two vehicles involved in the accident were a truck and a car. He said staff were working to free people from the wreckage.
Local accommodation provider Lynn Robinson was rocked to hear the accident so close to her home was fatal.
"It's just tragic - it's devastating."
She said the accident had happened just beyond a sharp bend that had only recently had its speed limit reduced to 80 km/h because of the high number of accidents over decades.
The stretch of road where it happened was known to be the only place for some distance - north or south - where cars could pass each other.
"All the fast drivers and trucks know that the place to pass but it's a blind corner and you've got to time it just right."
Robinson said the fatal nature of the accident meant locals would be on tenterhooks waiting to find out if the lives lost were people known to them.