An email reportedly containing threats has been sent to schools and businesses in County Antrim, according to police.
PSNI officers are investigating the contents included within this email, and are conducting a number of enquiries.
Reassurance patrols have also been increased in the areas affected.
Police urge anyone to report anything suspicious to on the 101 number – always 999 in an emergency.
Police will also be engaging with anyone affected including schools, businesses and partner agencies throughout the course of today as our enquiries continue.