pbr Accident investigators are looking into a horrific school bus crash that left two adults dead.br ppbr The accident happened on the A4177 between Hatton and Hatton Park in Warwickshire when the single-decker bus carrying 21 children collided with a car.br ppbr Two adults were confirmed dead at the scene. A schoolboy on the bus had to be cut from the wreckage before being airlifted to hospital.br ppbr A woman in the car was also seriously injured, according to West Midlands Ambulance Service.br ppbr Four pupils needed further treatment for minor injuries at hospital in Warwick while the remaining 16 were allowed to return home after being checked over by paramedics.br ppbr An ambulance service spokeswoman said: "The bus also collided with a tree. Both vehicles sustained very significant damage in the crash.