The alarm was the result of a refrigerator door blowing off and hitting the inner pane of a double-paned window in a chemical lab.
A HAZMAT team ensured the building was cleared. The building was not occupied at the time. No hazardous chemicals were spilled and there was no fire when crews arrived. TFR HAZMAT team vented the building. Fire marshal’s investigator arrived to determine the cause of the explosion. The building will remain closed until all investigations are complete and USF officials determine it is clear for reentry.