A statement from the district said due to heating, ventilation and air-conditioning (HVAC) issues, traces of mold were found in several classrooms.
The district reported that an environmental remediation contractor began working to remove the problem at 3:30 p.m. Wednesday.
While students will have the day off, Kelly staff will report to the Hill-Freedman World Academy located at 1100 Mt. Pleasant Street.
The district said it will provide an additional update at noon for parents, staff and the school community.
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