SUNSET HILLS, Missouri (KMOV) -- Police are investigating after a small device exploded inside a bathroom at a Sunset Hills school on Monday.
Authorities said a "bleach bomb" went off around 7:20 a.m. inside the men's bathroom at South County Technical School.
Officials said the school was evacuated for a short time as a precaution.
No injuries or damage were reported.
No suspects are in custody.
School district officials said police told them they have lately seen a spike in the use of similar explosive devices.
Additional information was not immediately available.