MT. PROSPECT, Ill. (CBS) — A building housing a carpet outlet and an electronics store was evacuated in northwest suburban Mount Prospect, amid fear that the roof would collapse.

Employees of the Tri-State Electronic store at 200 W. Northwest Hwy. feared that the truss roof was going to give way, and Police Officer Greg Sill said they called 911 and got out.

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Employees of the carpet store that shares the building also cleared out quickly, all without injury.

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Police blocked off the two lanes of Northwest Highway closest to the building, while structural engineers and building inspectors took a closer look.

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Sill said that the lane closures will remain in effect until the building is declared safe.