Falling rocks hit the top of a vehicle traveling on Going-to-the-Sun Road in Glacier National Park, killing a 14-year-old Utah girl and injuring her parents and two other children, the AP reports. Park officials say the rock slide happened at about 7pm Monday near the East Tunnel on the scenic highway. Rocks ranging from fist-sized to 12 inches in diameter fell from an unknown height, shattering the vehicle's rear window. The girl's name and hometown were being withheld until family members can be notified. Park officials say her parents suffered significant bruises while the other children had minor injuries. The last fatal injury from falling rocks on the Going-to-the-Sun Road was in 1996. (More Glacier National Park stories.)