(CNN) -- A tour bus overturned Friday afternoon on U.S. Route 93 near Hoover Dam, killing at least six people and injuring at least 16 others, an Arizona Department of Public Safety spokesman said.
Authorities work on the crash scene Friday on the highway near Hoover Dam.
The accident happened at 4 p.m. on U.S. 93 at mile marker 27, about 27 miles south of Hoover Dam, said Lt. James Warriner.
The dead lay in body bags on the roadway near the bus, which was stretched on its side across both lanes and onto the shoulder on the highway.
The injured were being taken to University Medical Center in Las Vegas, Nevada, and some may have been taken to Kingman Regional Medical Center in Kingman, Arizona, Warriner said.
The north-south highway at the crash scene in White Hills, Arizona, was shut in both directions. Officials said the bus was heading from Las Vegas to Arizona. Hoover Dam is near the border of the two states.
Initial reports from the scene indicated the bus was carrying international tourists and that there were communication and language issues with the victims.