A Drexel University dormitory was evacuated Wednesday morning after authorities detected a chemical leak.
The Philadelphia Fire Department responded to the hazmat situation at Millennium Hall on the 200 block of North 34th Street in the University City section of Philadelphia around 8:30 a.m.
The chemical causing concern was freon, according to school officials. The scene was placed under control by authorities by 9 a.m.
All those in the building had already begun evacuating before fire crews arrived, according to reports.
The dorm, which houses up to 480 residents, was not fully occupied Wednesday since classes have yet to begin at Drexel.
Students were allowed to return to their rooms around 9:40 a.m., according to school officials.