A man is in critical condition, another two are seriously injured, and another two have been injured after four separate crashes throughout the country.
A motorcyclist was flown to hospital after a serious crash on State Highway 2 near Kaitoke in Upper Hutt about 4.30pm yesterday.
A Fire and Emergency New Zealand spokesman told The New Zealand Herald the motorcyclist had been flown to hospital in a critical condition.
A police spokesperson said the motorcyclist hit a barrier which forced the temporary closure of the road.
In Waikato, a person was seriously injured in a crash in Karapiro, shortly before 9pm.
In South Auckland, one person was seriously injured and another suffered moderate injuries after a crash in Otara around 11pm.
Another person was injured after their car crashed into a power pole and through a fence in Waitara, Taranaki just before midnight.