Officials in Illinois said on Monday that multiple people were killed in a 40- to 60-car pile-up caused by a dust storm.

“I-55 is shut down both south and northbound I-55 from milepost 63 to 80 at this time due to a large crash,” Illinois State Police said in a statement. “Traffic is being diverted onto the frontage road.”

The Illinois Department of Transportation said in a tweet that the crash was “caused by a dust storm, which has greatly reduced visibility.”

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