A truck has crashed on a busy highway near Benneydale in Waitomo district this afternoon.

Emergency services are at State Highway 30 near Ellis Rd.

They were called there shortly before 3.30pm.

A police spokeswoman said officers were with the driver, who was not seriously injured.

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There was, however, a diesel spill as a result of the accident and authorities including the Fire Service are working to clean it up.

The area is blocked and traffic is starting to get heavy.

Police urged motorists to drive carefully as the accident happened at a blind corner.