STERLING, Colo. (CBS4) — Four people were killed in Sterling after a semi truck jackknifed on Interstate 76 and was sticking out across the eastbound lanes.

The crash happened just after midnight. Colorado State Patrol Trooper Gary Cutler says a Chrysler Pacific traveling east went underneath the semi. The roof of the car was torn off in the crash.

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Officials says all four people in the car were killed.

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They add the roads were slick Friday night. The 46-year-old driver of the truck and his male passenger were not hurt.

No information on the victims of the crash has been released.

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It’s not clear if the truck driver took measures to warn oncoming traffic.