Part of a McCalla school was evacuated Wednesday, after an unknown substance was leaked.
The incident happened about 8:30 a.m. at McAdory Middle School.
A school system spokesperson says a student brought a thermostat onto a school bus, and carried onto school grounds. The student apparently threw the thermostat onto the gym floor, where it broke, leaking out an unknown substance.
The gym was evacuated, while environmental officials were called in to investigate, and then clean up the spill.
No children were in danger at any time, and there were no injuries reported.