A truck driver has been charged in relation to the Good Friday crash that killed two young children.
The 70-year-old, is facing two charges of careless driving causing death and two charges of careless driving causing injury.
The crash, which occurred on March 30 on the Desert Road near Waiouru, claimed the lives of Arteen Mosaferi, four, and his two month old brother Radeen Mosaferi and injured their parents.
Arteen and Radeen were Dr Mohadeseh Sharifi, a scientist for AgResearch, and Siamak Mosaferi's only children.
Police were called at 3.20pm on Good Friday when a car and truck collided about 20 minutes drive north of Waiouru.
The crash closed State Highway 1 between Waiouru and Rangipo from around 3.20pm into the night on Good Friday.
Arteen died at the scene and Radeen died in Starship Children's Hospital in Auckland on Easter Sunday.
Both children were correctly restrained in car seats, police said.
The truck driver has also been charged in relation to logbook offences.
He is due to appear in Taupō District Court on June 27.
A Givealittle page was set up by the operations manager at Stiles and Hooker in Waikato for the family.