A teaching assistant has been charged with threatening to blow up the school at which she worked in a message sent from a pupil's email account.
Zoe Gregory, 26, allegedly sent the threat to Ormiston Victory Academy in the East Anglian town of Costessey, near Norwich.
The email warned high explosives had been planted on school grounds. A 16-year-old girl who owned the email address had her home raided by police and was questioned as a result.
Gregory was charged with communicating false information and unauthorised computer access. She was released on bail until an appearance at Norwich Magistrates' Court on 14 April.
A spokesman said Ormiston Victory Academy fired Gregory over the incident.