“The Montana Highway Patrol is on scene with other first responders investigating the incident,” Knudchen said. “This investigation is still ongoing. We will release more information as it becomes available and appropriate out of respect for the lives lost and their loved ones.” Interstate travel was detoured overnight, but I-90 has since reopened, the highway patrol said. “I am deeply saddened by the news of a mass casualty near Hardin. Please join me in prayer to lift up the victims and their loved ones. We are grateful to our first responders for their service,” Gov. Greg Gianforte tweeted. Friday. Ariel Dehart saw a camper van tear into the pileup while driving westbound on I-90 near Hardin. Dehart told CNN she was driving moments after the accident. There were only a few first responders at the scene at the time, he said. “The visibility was so bad and scary,” Dehart said. “The air was warm and eerie. It was like wearing sepia glasses. It was so crazy.” “When I saw the torn-open caravan, my gut dropped,” he said. “But the owner was just frantically putting his decorative pillows back in the campsite and it was so sad because he was obviously so on his mind with what had just happened.”