Glastonbury High School was evacuated on Friday after some chemicals started smoldering during a science class.
Glastonbury Supt. Dr. Alan Bookman, said students cleaned the chemicals up with a paper towel, then threw the towel in the trash can and it began to smolder.
The fire department responded and students were evacuated as a precaution.
Everyone was allowed back in in around 20 minutes later.
Local
Officials from the state Department of Energy and Environmental Protection responded since it was for a chemical.
The science room will remain empty as a precaution and classes were moved to other rooms.
No injuries are reported.