At least two Australians are injured after a bus carrying over 30 tourists from Australia, Canada and the United States crashed into a truck filled with car tires near Heidelberg, Germany.
Local police say their condition is unknown.
Five rescue helicopters and seven ambulances raced to the scene in the small south-western town of Hockenheim, about 20 kilometres from Heidelberg, to carry off injured passengers, a police spokesman said.
He said the road was shut for several hours.
Eighteen people have been injured, including the drivers of the bus and truck, with nine in a serious but non-life threatening condition, authorities say.
Broadcaster SWR said a total of 35 people were injured in the accident, including the drivers of the bus and the lorry, and four people were in critical condition.
Broadcaster SWR said the bus shifted into the opposing lane and collided with the truck while approaching an on-ramp to the A61 highway.
The police spokesman could not immediately confirm those details.
Both vehicles stopped side by side with major damage to the front of the tourist bus.
The Department of Foreign Affairs and Trade has been contacted.