Authorities are responding to a report of a hazmat situation at the Dirksen Federal Building in Chicago‘s Loop Monday morning. 

Fire officials were responding to a “report of a hazardous materials situation” just after 8 a.m. Monday, according to CFD spokesman Larry Langford. Police said the level two hazmat began after chemical sensors were activated in the building. 

Just before 9 a.m., fire officials said air quality was “normal” inside the building and no evacuations were being ordered. 

No injuries had been reported as of 8:50 a.m. 

Traffic was being blocked off in the area of Jackson and Dearborn during the morning rush hour, authorities said. 

Details on what prompted the hazmat response remained unclear. 

An alert to employees ordered those inside the building to “shelter in place” “due to a potential hazardous situation” at the courthouse. The alert said there would be no access to the building. 

Check back for more on this developing story. 

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