Two people are dead after a car struck a tree in Auckland's Kumeu, taking the number of fatalities on roads on Friday to five.
Both people in the car died after the crash on Access Road just before midnight, police said.
It followed another death in a two-car collision on State Highway 65 at Maruia, in the West Coast.
One person was also left critically hurt and taken to Christchurch Hospital following that accident, about 9pm. Four others received moderate injuries.
Earlier in the day, a person died and four were hurt in a three-car pile-up on State Highway 1 north of Waimate in Canterbury.
And in Northland, one person was killed in a crash on State Highway 1 at Towai on Friday afternoon.
Two people also died after being struck by a train at a crossing in Auckland's Papakura about 11pm, police said.