A Fire and Emergency NZ spokesman said the Fire Service was in attendance and were assisting police and St John. They were also helping with traffic management.
St John said one patient was in a critical condition and was being transported to Auckland Hospital in a helicopter.
SH25 MANAIA, WAIKATO - SERIOUS CRASH - 8:50AM Due to a serious crash south of Manaia, the road has been CLOSED. The serious crash unit is on site so the road may remain closed for a number of hours. The Detour route is along SH25A between Kopu and Hikuai. ^RS pic.twitter.com/O7UWaZQIRe
— Waka Kotahi NZTA Waikato/BoP (@WakaKotahiWaiBP) January 3, 2019