The Federal Courthouse in downtown Waco was quarantined after a suspicious powder was discovered Monday, but authorities now say the substance was not a chemical or biological toxin.
Two employees and two firefighters exposed to the substance were hospitalized as a precaution.
The building’s ventilation system was also shut down after the discovery because there were concerns the powder may have spread to other offices, employees were kept in the building while a HAZMAT team did its work.
After teams finished checking the building, the all clear was given around 6:30 p.m.
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