Schools in Northern Ireland closed after a threatening email; police investigating possible hoax.

Schools in Northern Ireland temporarily closed on Monday due to a "security concern" after receiving a threatening email, believed to be a hoax. The email prompted closures in nine schools across counties Antrim, Fermanagh, and Tyrone. Police are investigating and liaising with the Metropolitan Police in London. Some schools have since reopened after receiving an all-clear. Local politicians and the Education Authority have expressed concern over the incident.