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BILLINGS, Mont. – More than 30 vehicles were involved in a crash on a snowy Montana interstate Saturday afternoon.

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Traffic on Interstate 90 in both directions just east of Billings was halted by the crash, which occurred on a bridge crossing the Yellowstone River, the Billings Gazette reported. The crash took place in the westbound lane of I-90, and troopers with the Montana Highway Patrol said about “30 to 40″ vehicles were involved, KRTV reported.

Damaged cars, trucks and SUVs spanned nearly half of the bridge, the Gazette reported.

“It was like bumper cars,” Bella Contreraz, who was involved in the pileup, told the newspaper.

Contreraz said she was on her way to work and hit the brakes when she saw vehicles stopped ahead of her, the Gazette reported. Contreraz said she was hit from behind by an oncoming semi-truck and had to be helped out of her vehicle by another motorist, who pried open her door.

At least two people were injured and transported to an area hospital, the Gazette reported.

A Billings city bus was sent to the scene to transport people with disabled vehicles to safety.

Troopers said they did not know what caused the crashes, KRTV reported.

>> Texas crash: 5 victims identified after 6 killed in 130-vehicle crash in Fort Worth

The crash comes slightly more than two weeks after more than 130 vehicles were involved in a crash on an interstate in Fort Worth, Texas. Six people died in that pileup.