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'. Paul Givan said the warning is not being treated as a ‘viable threat but it has clearly caused huge alarm’. Key points and original sources are listed below.

• 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