Two people have died after a truck and car crash on State Highway 29.

Police said the crash, near Karapiro, was reported around 6am.

Vehicles are being turned around as the highway is expected to remain closed for most of the day.

“Please avoid the area and take alternative routes. Diversions are in place”.

Police advised motorists to check the New Zealand Transport Agency Journey Planner.

State Highway 29 is blocked following a two-vehicle crash. Photo / Google Maps

Three fire crews had been called to the crash, Fire and Emergency northern shift manager Josh Pennefather said. At 6.20am they had arrived at the scene.

Hato Hone St John had also attended after being called at 5.58am, a spokesman for the ambulance service said. Further inquiries were directed to police.

The Serious Crash Unit and other emergency services are working at the scene to understand the circumstances of the crash, police said.