Multiple schools sent into lockdown and children stopped from leaving after colleges receive 'threatening emails' - as police launch probe into messages
Youngsters in Clacton and north Essex were kept inside their classrooms following the malicious message, which was sent to at least four primary and secondary schools on Tuesday morning.
Youngsters in Clacton and north Essex were kept inside their classrooms following the malicious message, which was sent to at least four primary and secondary schools on Tuesday morning.
