The spokeswoman referred further queries to the police.
A witness at the scene said he could see a car and truck appeared to be involved. He said the car was “crushed” and there was a trail of debris on the road.
The overturned truck was on the railway side of the road
The witness, who would not be named, said he was travelling from Whakatāne to Tauranga when he came across the scene, he believed just minutes after the incident happened.
He said he saw a person being helped from the cab of the truck and first responders were arriving at the scene.
Video from the crash scene shows a truck and trailer on its side, half on the road and in the paddock.
Contents from the trailer had spilt on to the side of the road.
A KiwiRail spokesperson said part of the railway line in the area was closed by police for a period, delaying a freight service, but had since reopened.