Per the article, all of them survived, largely due to the efforts of their bus driver.
"There they were held captive inside a buried, ventilated trailer stocked with mattresses, food and water. The victims eventually managed to dig their way out and escaped unhurt."
23 posted on 07/31/2015 7:58:21 AM PDT by knittnmom
(Save the earth! It's the only planet with chocolate!)