Rescue helicopters at the scene of the crash. Photo: Ruby Shaw
Senior Sergeant Clint Wright, of Alexandra, said early indications were that one of the two vehicles involved in the crash may have crossed the centre line.
The accident happened on Conroys Rd, not far from the intersection with State Highway 8.
Police were called to the accident at 12.25pm.
Six people were injured in the crash. Two of those suffered critical leg injuries while others suffered minor-to-moderate injuries.
Three helicopters, three police vehicles, three St John ambulances and two fire appliances all attended.
Emergency services at the scene of the crash near Alexandra. Photo: Ruby Shaw
The serious crash unit was expected at the scene.
Detours were in place through Earnscleugh for a time, but about 4pm NZ Transport Agency Waka Kotahi advised that the highway had reopened, but there could still be delays.
