Fire officials in Allentown say the Roberto Clemente Charter School had to be cleared of students and staff Monday morning. Two employees were taken to a hospital because of breathing problems caused by the gas but no students were affected.
The students were taken to a nearby gymnastics training center and would be allowed to return to the building after air quality tests found no danger.
Assistant Chief Lee Laubach says a member of the cleaning staff mixed chlorine bleach with another product, producing the odor.
