What to know

• The Police Service of Northern Ireland said 'up to 300' schools reported receiving the email threat and Paul Givan (pictured), Stormont's education minister, said it was signed 'Allahu Akbar'.S1
• Paul Givan said the warning is not being treated as a ‘viable threat but it has clearly caused huge alarm’.S2
• Threat not viable, says Stormont Education ministerS3