Multiple people are dead and dozens injured after a massive pileup Monday in Illinois caused by a sudden dust storm, officials said.

Illinois State Police Maj. Ryan Starrick said during an afternoon press conference he did not have an official death toll, but said more than 30 people were transported to the hospital.

The crash took place at about 11 a.m. local time on Interstate 55 in Montgomery County, officials said.

Forty to 60 passenger vehicles and at least 20 commercial vehicles were involved in the crash, including two semi-trucks that caught fire, police said.

The cause of the crash was excessive winds blowing dirt from farm fields across the highway, Starrick said.

Law enforcement is currently doing a secondary search of vehicles, but it's preliminarily believed that everyone has been transported away from the scene, he said.

"My team and I are closely following the devastating crash on I-55 as authorities learn more," Rep. Nikki Budzinski said in on Twitter. "Please be safe as this situation continues to unfold."