KINGMAN, Ariz. -- Two passengers died and several others were injured Sunday in the crash of a Las Vegas tour bus headed for the Sky Walk at Grand Canyon West in northwest Arizona.
Mohave County sheriff's deputies responded to the crash on Pierce Ferry Road off U.S. Highway 93 at 8:05 a.m.
"The vehicle had drifted off the roadway and rolled several times," sheriff's office spokeswoman Trish Carter said. "Two passengers were pronounced dead at the scene."
Carter said many of the nine other passengers were seriously injured. Some were transported to hospitals in Las Vegas and others to Kingman Regional Medical Center.
Ashlee Seymour, a spokeswoman for Sunrise Hospital and Medical Center, confirmed the hospital is treating one male and two female crash victims. One of the female victims was in critical condition Sunday evening. The other two patients were listed in serious condition.
Danita Cohen, spokeswoman for University Medical Center, said the hospital is treating two crash victims, a woman in good condition and a man in critical condition. Both were airlifted to the hospital from the crash site.
Carter said an off-duty emergency medical technician called 911 after coming upon the crash scene. She said the woman provided emergency medical attention to the injured before other responders arrived at the scene.
Carter said the bus driver suffered minor injuries and was cooperating with investigators. Passengers' names were not immediately released, but Carter said they may be tourists from another country.
Authorities did not have details about the owner of the bus.
Sunday's crash marked the third time in two years that the region, home to tourist attractions that include the Grand Canyon and Hoover Dam, has experienced a deadly tour bus crash.
In January 2009, seven people died and 10 were injured when a charter bus carrying a group of Chinese tourists on a return trip from the Grand Canyon crashed on U.S. 93, the main highway leading to Hoover Dam.
In August, three Japanese tourists were killed and 11 others injured when the bus they were traveling in rolled on Interstate 15 in southwestern Utah. They were on a four-day tour of national parks, including the Grand Canyon.
The Associated Press contributed to this report.