Two Tauranga truck drivers are in Waikato Hospital with multiple injuries.
The men, 63 and 66-years-old, were injured in a crash on State Highway 27, near Tatuanui in the Matamata-Piako District.
The crash closed the stretch of highway for several hours on Friday afternoon.
A spokesperson for the families of the injured men says they are drivers for Rowe Motors in Tauranga.
She says they are in Waikato Hospital with multiple critical injuries.
The Waikato Westpac Rescue Helicopter was dispatched to the accident at about 11.30am.
A spokesperson for the rescue chopper says a heavy haulage truck had rolled on SH27.
The cause of the crash is being investigated.
Anyone with information about the crash is asked to contact their nearest police station.
Alternatively, information can be left anonymously via the Crimestoppers 0800 555 111 line/