While travelling a mountain road in the Andean Mountains along the Altoandiana highway , the bus veered off the road .
While travelling a mountain road in the Andean Mountains along the Altoandiana highway , the bus plunged down a 200 - metre ravine .
While travelling a mountain road in the Andean Mountains along the Altoandiana highway , the bus veered off the road and plunged down a 200 - metre ravine .