One person was taken to Whanganui Hospital on Thursday afternoon following a three-vehicle crash just outside Whanganui city.
Emergency services were alerted to the collision at the intersection of State Highway 3 and Blueskin Rd around 1.20pm.
St John responded with one ambulance and one manager, treating one patient in a moderate condition and two in a minor condition.
One patient was taken to Whanganui Hospital in a moderate condition.