A 4-year-old boy had just been using a school pool when he was hit by a light truck in Pukekohe, south of Auckland, last night.
The boy was taken to Starship Hospital, but died from his injuries.
Counties Manukau road policing manager Inspector Neil Fisher the boy was part of a group that had been using a school pool and was walking to a house across the road about 8.10pm.
He was hit by a light truck travelling along Union Rd and passing Mauku School.
"We're deeply saddened by the tragic loss of life'' Mr Fisher said.