State Highway 25 in the Coromandel is closed this afternoon following a serious crash.

Emergency services are in attendance at a serious crash on Tairua Road, says a police spokesperson.

"The single-vehicle crash happened south of Pukepoto around 12:30pm.

"Indications are that there are serious to critical injuries."

A helicopter is at the scene.

"The road is closed as the Serious Crash Unit attends.

"Diversions are in place."