A section of State Highway 1 north of Ashburton has been closed following a serious two-vehicle crash on Thursday evening.

The highway is shut between Works Road and Fairview West Road, with emergency services at the scene. The crash was reported to police around 7:20pm.

Chris Lynch Media understands multiple people were trapped in one of the vehicles.

A rescue helicopter has been dispatched to assist.

A police spokesperson said, “Indications are that there are serious injuries. Diversions are in place and motorists should expect delays. The Serious Crash Unit is in attendance.”

Motorists are advised to avoid the area or delay travel if possible.

Drivers should follow the instructions of emergency services, who are managing the scene and directing traffic.