Three people received moderate injuries in a crash at the intersection of Great North Rd (State Highway 3) and Rapanui Rd in Whanganui.
A Fire and Emergency New Zealand (FENZ) spokesperson said a car and a ute collided at the intersection just after 11am on Sunday.
Two fire crews and a support vehicle responded from the Whanganui station.
"We administered first-aid, liaised with police and waited for the ambulance to arrive."
The spokesperson said there was heavy traffic in the area, and Great North Rd was blocked.