Hato Hone St John said they received the call about 5.28pm and sent one rapid response vehicle, one operations manager and five ambulances to the scene.
“We will be transporting two people in a serious condition and three in a moderate condition to hospital.”
One witness said a young male driving a ute had overtaken on a corner and driven straight into a car with four elderly people.
Sign up to The Daily H, a free newsletter curated by our editors and delivered straight to your inbox every weekday.