One person is understood to have serious injuries following a serious crash involving a truck and a car on on State Highway 2, south of Waihi.
Emergency services are in attendance of a serious crash, says police in a statement.
"A car and a truck collided around midday. Indications at this stage are at least one person has serious injuries.
"Motorists are asked to avoid the area if possible."
Diversions are in place at Waihi Beach Road and Athenree Road.