Authorities say 53-year-old Dana Easter, of Independence, Missouri died in the crash.

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We've learned a "Dancing with the Stars: LIVE!" tour bus was involved in the 70+ vehicle pile up on I-35 near Ames. A spokesperson for the tour says a couple crew members had minor injuries. However, due to the crash, the tour has cancelled its show for tonight in Ames.

"To anyone involved in the accident, the entire cast sends their best wishes for a speedy recovery, and their deepest apologies to all of the fans who have been waiting to see the show tonight," the tour said in a statement. Information on refunds will be released soon.

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Authorities have updated information on a crash near Ames that the Story County sheriff is calling the worst crash he's ever seen.

Law enforcement now says more than 70 vehicles were involved in the crash. They say one person has died and five are critically injured.

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Authorities say southbound lanes of Interstate 35 in Ames have closed after dozens of vehicles collided on the snow-covered freeway.

Transportation officials say up to 50 vehicles were involved in the crash Monday, caused in part by drivers trying to enter the freeway and crashing into existing accidents.

Iowa State Patrol Sgt. Nathan Ludwig told The Des Moines Register, "It's a mess. They're trying to get everyone to slow down."

Crashes also have at least briefly forced the closure of other roads in Iowa, including U.S. Highway 30 near Grand Junction and Interstate 80 in Clive.

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KCCI says Ames city buses have picked up accident victims. The buses are taking the people to Ames City Hall, where Red Cross volunteers are able to help them.

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The Iowa DOT has closed the northbound lanes of I-35 between exit 113 and Highway 30 to allow access for emergency vehicles.

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Multiple accidents on I-35 southbound have caused a blocked road near Ames. Authorities say at least 50 vehicles are involved.

At 12;52 p.m., Google reported a two-minute delay northbound and a 15-minute delay southbound.

Between Exit 113:13th Street and Exit 111: US 30 (Ames).

Stay with TV9 for the latest update.