A school bus and a tractor-trailer collided near Blue Hill , Nebraska , the sheriff says . The driver of the tractor was killed in the crash. local time , he said . Also killed were two passengers on the school bus , he says .
A school bus and a tractor-trailer collided near Blue Hill , Nebraska , the sheriff says . The driver of the tractor was killed in the crash. Also killed were two passengers on the school bus , he says .