A cross-country Amtrak train derailed early Monday in southwest Kansas, sending 32 passengers to hospitals, the railroad said in a statement.
The nine-car passenger train, known as the Southwest Chief, was bound for Chicago from Los Angeles when it went off the tracks just west of Dodge City shortly after midnight, Amtrak said. Dodge City is about 150 miles west of Wichita.
Images and video posted to social media appeared to show four of the train's cars on their sides, with another teetering at an angle.
Daniel Szczerba, who was identified as a passenger, said he encountered a man after the accident who appeared to have been hurt, according to a video published by The Associated Press.
"'Friend! Are you all right? What's going on?'" the man said, Szczerba recounted. "And he said, 'Is there any blood?' And I kind of shined my cellphone light and his face was very bloodied."
Amtrak said initial reports indicated none of the injuries were life-threatening.
Officials provided no immediate word on the possible cause of the derailment. The National Transportation Safety Board said it was sending a team to investigate the accident.
The uninjured travelers were taken to a recreation center in Cimarron, Kansas, where the Red Cross and other agencies were providing assistance.
The train, which travels more than 40 hours on its route through scenic landscapes in the American West, was carrying 131 passengers and 14 crew members, Amtrak said.
The railroad, ostensibly private but partly funded by the government, has struggled to maintain its aging infrastructure. Republican leaders in Congress have pushed to cut Amtrak's financing in a partisan debate that was inflamed after a deadly derailment in Philadelphia last year.
Still, passenger deaths have been relatively rare, with trains derailing about 30 times a year over the past decade, according to data from the Federal Railroad Administration.