A woman is in a critical condition and a man is in a moderate condition at Waikato Hospital after the car they were travelling in crashed into the Waikato River.
Police earlier reported the woman had died, but have since said the information was wrong and that the woman regained a pulse after an hour of CPR.
She is in the intensive care unit at Waikato Hospital.
The car and trailer plunged into the river about 12.25pm today at the intersection of Tirau Rd and Shakespeare St in Cambridge.
A police spokeswoman said the car appeared to have gone through the roundabout and over the edge near the low-level bridge. Two people were in the car.