One person was taken to Palmerston North Hospital in a moderate condition after a crash on State Highway 2.
Emergency services were called to the scene, just by Rawhiti Street, at about 8am on Wednesday, and the road was blocked for some time.
A spokesperson from Hato Hone St John said they received a call at 7.51am and three ambulances responded.
Three people were treated - two in minor conditions and one in a moderate condition.