One person is dead after a car struck a tree in Kāingaroa Forest.

A police spokeswoman said the crash on Dun Rd was about 2km out of Kāingaroa Forest, towards State Highway 38.

The driver was the sole occupant in the car.

Dun Rd is down to one lane while the police serious crash unit is at the scene.

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Motorists are asked to avoid the area.

Police were called at 9.25am about the crash via 111, and arrived just before 10am.

Police are notifying next of kin.