A fatal crash north of Katikati was discovered just after it occurred by a patrol car on its way to another traffic accident.
One person died and several were injured in the accident on State Highway 2, around 4km north of Katikati.
Police were initially heading to a different crash - involving two cars on Katikati's main street, where one car was on its roof, and three people, including a baby, were reported to be injured.
One woman was unconscious and said to have life-threatening injuries.
Diversions were being put in place, and the crash will be investigated by the serious crash unit.
Police asked drivers in the areas to drive carefully and expect delays.
- Waikato Times