A pregnant woman has been flown to hospital after a crash south of Taupo.
The 20-year-old suffered head and shoulder injuries after the car she was in hit black ice on State Highway 1, near Hatepe about 5am today.
The woman, who is 40 weeks pregnant, was taken to Waikato Hospital by the Greenlea Rescue Helicopter.
Police remain at the scene where a car is on its roof.
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Police said three other occupants were uninjured.
Motorists are being asked to drive with caution and watch for ice with reports that sections of the highway in the area are quite treacherous.
Roading contractors have been advised and will be gritting sections of the highway.