CONCORD (CBS SF) — Police in Concord are investigating threats made on social media against Clayton Valley Charter High School on Friday.

A student at the school made the threats and that student has been identified and placed on a mental health evaluation hold, according to the Concord Police Department.

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On Friday at 7:17 a.m., the police department responded to the school after school staff learned of possible threats made against the school by a student on social media.

Clayton Valley Charter High School

Clayton Valley Charter High School. (Google Street View)

School staff placed the school on lockdown prior to police arriving.

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The lockdown was lifted when it was determined the student was not on campus.

Officers contacted the student at home and the student was interviewed and placed on a mental health evaluation hold.

Police said the investigation into the exact nature of the threats is ongoing but there is no threat to the school or students.

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