The scene of a crash between a tourist bus and a car which has left 18 people injured on Victoria's Phillip Island was chaotic, emergency officials say.
As help arrived late on Saturday night, the group of scared and injured Chinese holidaymakers were huddled on the roadside, their bus had careered into the trees and two people were trapped inside the extensively damaged car.
Because of the number of casualties, a state emergency response plan was activated and a roadside triage tent set up to treat them.
The most seriously hurt, two teenagers, were flown by air ambulance to The Alfred hospital in Melbourne.
Police believe the sedan was travelling north on Pyramid Rock Road at Ventnor when it collided at an intersection with the bus which had been heading east on Back Beach Road just after 10pm (AEDT).
The bus, carrying 32 Chinese tourists, their guide and the driver, then veered off the road into a paddock.
It is understood the group was returning from visiting Phillip Island's famous penguin parade.
Fortunately three doctors, including an emergency physician and several nurses who were working with St John Ambulance at the nearby Tough Mudder event, were able to rush to the scene.
Ambulance Victoria said the driver of the car and his passenger were the most seriously injured and were flown to Melbourne.
The 19-year-old driver has neck and facial injuries and his 17-year-old female passenger has arm and abdominal injuries.
Phillip Island ambulance paramedic Mal McCann arrived to find a "chaotic" scene which was exacerbated by language difficulties, he said.
"It was a pretty full-on scene," Mr McCann told AAP.
"You had a bus through the trees, groups of obviously foreign tourists right on the side of the road, very scared, and an extensively damaged vehicle on the other side with people trapped in it."
Eight were taken by road ambulance to the Dandenong Hospital with minor injuries including cuts, abrasions, bruising and strains.
Another eight were treated at the scene.