Neither police nor Hato Hone St John could immediately be contacted to confirm if anyone was injured.
A serious crash between a car and a truck has led to the closure of State Highway 1 between Kinleith and Ātiamuri. Image / Google Maps
But SH1 was closed between Kinleith and Ātiamuri, the NZ Transport Agency (NZTA) wrote on its website.
“Due to a serious crash SH1 is closed. Consider alternate routes,” it wrote.
Those travelling north should turn left onto SH30 and continue until turning right onto SH32, and then turn back onto SH1.
Southbound traffic should take the same route in reverse.
It was not known when the highway would reopen, NZTA wrote.