Sheriff's deputies and the Columbus Bomb Squad were investigating a bomb threat at the Tolles Career & Technical Center just outside of Plain City.
Deputies tell 10TV a written threat was found that made statements about blowing up the school.
The Columbus Bomb Squad was called to help sweep the school with K-9 units.
Nothing was found and classes were not impacted today. Parents have been notified.
Deputies tell 10TV extra patrol will be at the school today as a precaution.
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