High winds kicked up sand and dust along Interstate 15 in Utah, Sunday afternoon leaving at least seven people dead and several injured.

20+ cars were involved in a fatal pileup along Interstate 15 in Millard County after stopping suddenly along the busy highway due to visibility.

Andrew Battenfield, a spokesman for Utah Highway Patrol said,

“No one could see, so people started stopping, and then you just get a chain reaction… all of a sudden, you’re slamming into a car. It’s just a horrific situation.”

Law enforcement authorities did not know exactly how many people had been sent to the hospital and Battenfield said the highway would be closed “for a significant time.”

(Photo, Utah Highway Patrol; via The Daily Beast)