According to CBS News, approximately 150 students and employees were evacuated from the Harry and Jeanette Weinberg Jewish Community Center in Harrisburg, Pennsylvania – after a HAZMAT situation at the location.

The CBS report says that a custodian in the school accidentally mixed two chemicals usually put in the centers swimming pool separately, which caused a vapor cloud, strong odor, and sent one person to the hospital for evaluation.

There were no additional injuries, and the center was closed for the day.