Officials blame an overheated heat pump for smoke that forced evacuation of a high school in south-central Nebraska.
Kearney High School was emptied early Monday afternoon after smoke filled a classroom and an office.
Firefighters were called in, and officials say they found that a heat pump had overheated and sent a burning smell through the school hallways.
Students and staff members were let back into the building about an hour after evacuating.
No injuries have been reported.
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