One person has been airlifted to hospital with critical injuries after a crash at Lichfield near Putaruru.
A police spokeswoman said police were called to the two-vehicle crash on State Highway 1, north of Pinedale Rd, about 6.37am.
A St John spokesman said one patient was flown to Waikato Hospital in a critical condition.
A section of SH1 between Tokoroa and Putaruru remains closed with motorists urged to delay travel or allow an extra 20 to 30 minutes for a detour via Old Taupō Rd.