Police can now confirm the ages of the three people who died in yesterday's crash in Huntly.

A 12-year-old boy, a 14-year-old boy, and a 54-year-old man died at the scene.

Three people, including two children, were killed in a crash on State Highway 1. Photo: Mark Taylor/Fairfax NZ

A woman and a young girl were also in the car, says a statement from police.

The woman is in a serious condition and the young girl is stable in hospital.

While family members are still being informed, police say they're not in a position to release names at this stage.

Inspector Freda Grace, Strategic Traffic Manager for Waikato, says this crash is yet another reminder to drive safely.

'This means driving within the speed limits and to the conditions.

'Drivers must be fit for the road, which means being well-rested and focussed.

'Too often, a moment of fatigue or distraction has tragic consequences.

'While the investigation into the cause of the crash continues, our thoughts are with the family and friends of all those involved.”

The family involved in the crash had just arrived in New Zealand from their home in Brisbane when they crashed in their rental car, reports Stuff.

Police didn't think speed was a factor in the crash that occurred on a 70kmh stretch of highway near the centre of Huntly.

All of the occupants were wearing seatbelts.

"It is exceptionally sad all round," says Freda.

The Nissan collided with a Mark Grey Carriers truck, which had some damage to the front.

A trucking company spokesperson, who did not wish to give his name, says the Auckland-based driver of the courier truck had taken days off work.

The man in his 30s was uninjured in the crash but clearly upset about what had happened, he says.

"Our thoughts are with the family in the car, our driver is okay.

"He's been a professional driver for a number of years."

Both the trucking company and National Road Carriers were providing victim support for him.

Freda says police were likely to have more details about the crash on this afternoon

In the meantime she urged people to drive to the conditions.

"Drivers must be fit for the road, which means being well-rested and focussed.

"Too often, a moment of fatigue or distraction has tragic consequences."

- Additional reporting Stuff.co.nz