Police patrols have been increased in the area surrounding Granville Academy in Woodville, DerbyshireDerbyshire Police said officers had been made aware of a post about the threat made to Granville Academy in Woodville, Swadlincote.
The boy, who does not attend the school, has been held on suspicion of making threats and malicious communications.Police have not revealed the exact nature of the threat, but a spokesperson said officers were treating it "incredibly seriously". In a post on Facebook, the school added: "As an academy, we always seek to put the safety of our students and staff first and we will continue to be guided by the police investigation and outcome.
"At this point, we are awaiting further information and will provide a further update in due course."