PLACER COUNTY (CBS13) – A lockdown that was put in place at Granite Bay High School has been lifted.

The Placer County Sheriff’s Office confirms that the school went on lockdown a little after 2 p.m. after a threatening note was found on campus. The lockdown was later lifted and sheriff’s deputies went room to room searching for any sign of a potential threat. As of now, no threat has been detected.

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Buses were postponed while deputies investigated, but parents were told they could pick up their kids as usual.

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Classrooms were released one by one, school officials say.

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