the experts are still investigating the cause of the accident, which killed three people and injured over the last twenty five highway 117 near the annunciation in the laurentian mountains. a bus and a truck trailer collided in a curve, so that the weather was bad. according to an investigator.it seems that the driver of the bus has encroached on the opposite direction slightly to prevent a car from swerve. the truck would not have been able to avoid the bus. four of the injured were in serious condition.