Federal investigators are now investigating what caused Friday afternoon's charter bus crash on U.S. 93 near Dolan Springs, Arizona. Seven people were killed and ten others, including the driver, were injured. As of Monday afternoon, six of the victims remained at Las Vegas hospitals. Four are at UMC, and two at Sunrise Hospital. The bus is currently being stored in Kingman, Arizona for a full inspection. Investigators say a preliminary report on the accident won't be ready until later this week, at the earliest. On Monday, the California Public Utilities Commission reportedly suspended the license certification for the company that operates the bus, D.W. Tour & Charter of San Gabriel, California. The shuttle bus was carrying chinese tourists when it swerved out of control on the northbound 93 and crossed over the center median, rolling onto its side in the southbound lanes. The victims were all identified but the Arizona DPS says its been difficult because the victims are foreign nationals. The Chinese Consulate is helping authorities to contact family members.