A witness has told of "bodies all over the road" after a van carrying a nine-strong shearing gang rolled, after colliding with a tractor near Waipukurau last night.
At least five passengers in the van were thrown from the vehicle - three of which were flown to Hawke's Bay Hospital by the Lowe Corporation Rescue Helicopter and another rescue helicopters from Palmerston North.
Police believe seatbelts had not been worn by the occupants.
A Hawke's Bay Hospital spokesman confirmed eight people were admitted with injuries. A man in his 50s and a teenage female were critical while two teenagers, a 20-year-old male and a 40-year-old male had serious injuries. A teenage female and a woman in her 50s were both stable.
Emergency services were alerted to the smash, just east of Wanstead on Porangahau Rd, at 5.28pm and remained at the scene for more than three hours. Traffic was stopped either side of the scene and a makeshift helipad was set up on the road so the helicopter could land.