The Warner Robins Fire Department responded to an alarm at Houston County High School triggered by smoke in a storage room between two classrooms Wednesday morning.
The fire department received a call shortly before 9:30 a.m., said Warner Robins Assistant Fire Chief Randy Davis.
An overheated motor in a heating and air conditioning unit caused about three inches of smoke to collect near a ceiling in the storage room, according to Sgt. Porter Wood, school liaison officer.
School maintenance personnel later disconnected the wires to the unit, Davis said.
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Students and staff were evacuated from the school for about 22 minutes, and no one was harmed, according to Principal Sherri Freeman.