CHICAGO (CBS) — The Illinois State Capitol was locked down Thursday afternoon, after a white powder was found in a bathroom, but crews later determined the substance was not dangerous.

The statehouse was locked down after an unidentified white powder was found in a second-floor restroom shortly after 1 p.m.

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People inside the building were told to shelter in place, and no one was being allowed in or out while the Springfield Fire Department and Springfield Police Department investigated.

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Hazardous materials teams later determined the substance was not harmful, and the lockdown was lifted around 2:30 p.m.

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The capitol also was locked down in July 2017, after a woman sprinkled a white, powdery substance in the building just before a budget vote. The woman was released without charges after several hours of questioning. The substance in that case turned out to be harmless.