Armed police were sent to a secondary school after a threatening call this afternoon (Friday 18 October).
The school was placed in lockdown between lunchtime and the end of the school day.
But the threat, which was treated as if it were credible, has since been deemed to have been a hoax.
Sussex Police said: “We were called to Priory School, Mountfield Road, Lewes, after police received a threatening phone call shortly after 2pm this afternoon.
“Due to the nature of the threat, armed officers were quickly deployed to the scene and the school acted quickly to implement their lockdown procedures.
“Police are now satisfied that there was no substance to the threat made and a criminal investigation will now be undertaken to establish the identity of the person responsible.
“We would like to thank the school for working in partnership and acting so quickly to safeguard the children there.
“Also, the parents and the wider community for understanding and coping with the disruption caused.
“We would like to reassure students, staff, parents and the wider community that a policing presence will remain in the immediate vicinity of the school this afternoon.”
