One person has serious injuries after a crash on State Highway 1 near the Atiamuri dam.
A police spokeswoman said the person had been trapped following the crash between a truck and a small van between Thorpe and Walnut Rds.
They have been freed and taken to Waikato Hospital.
State Highway 1 has re-opened to one lane but diversions are also in place down Oruanui and Tirohanga Rds.