Montana Attorney General Austin Knudsen said first responders are investigating the crash west of Hardin and will release more information as it becomes available. Knudsen oversees the highway patrol.
“The Montana Highway Patrol is on scene along with other first responders and is investigating the incident,” Knudsen said. “This investigation is still ongoing. We will release more information as it becomes available and is appropriate out of respect for the lives lost and their loved ones.”
Travel on the interstate was detoured overnight, but I-90 has reopened, the Highway Patrol said.
While driving westbound on I-90 near Hardin, Ariel DeHart saw a camper van torn apart in a pile.
DeHart told CNN he was driving minutes after the crash. Only a handful of first responders were on scene at the time, he said.
“The choice was really bad and scary,” DeHart said. “The air was warm and weird. It was like wearing sepia-tinted glasses. It was so crazy.”
“When I saw the torn-open camp, my heart sank,” he said. “But the owner was frantically putting his decorative pillows back in the camper, which was really sad because he was very open about what happened.”
Jos Strickland also saw the pile. when there was a pileup in front of him on I-90, he told CNN.
Strickland says he and others helped an elderly man out of his vehicle and onto a stretcher into an ambulance.
About 45 minutes after the wreck, Strickland says he was helping people at the scene.
CNN’s Zoe Sottile contributed to this report.