A widespread bomb threat emailed to hundreds of educational institutions is being treated as a hoax, the Police Service of Northern Ireland (PSNI) has confirmed.

As many as 300 schools reported "receiving the same emailed message which contained a generalised threat", with police suspecting similar emails were delivered to other schools throughout the UK.

Multiple schools shut on Monday morning following messages claiming viable explosives were on site.

Stormont’s education minister Paul Givan described the message as "Islamist", noting it concluded with "Allahu Akbar".

Police investigations have uncovered nothing untoward, with officials confirming the email originated from outside the UK.

PSNI Assistant Chief Constable Ryan Henderson said the police “understand the concern in the community, not to mention the disruption it has caused in some school communities and for students and parents.”

“Our enquiries are ongoing, however, at this stage we consider risk to the public as low,” he said.

“We will continue to liaise with schools impacted and have been working closely with the Department of Education and the Education Authority this morning to provide reassurance.”

Speaking to reporters at Stormont, Mr Givan said the email was “threatening that Sharia law will be brought into our country and that there is viable devices within those school settings and it was signed off ‘Allahu Akbar’”.

“Some schools have closed as a result of this threat being received through formal communication channels to those schools, something that I absolutely condemn is that there has been this level of disruption caused to young people’s education,” he said.

He added: “This is something that ought to be condemned by everybody, and I am hugely disappointed that for some schools they have had to close, but it is not something that we are regarding as a viable threat, but nevertheless, hugely disruptive and very distressing.”

In a statement, the Education Authority said it is “aware that a number of schools across Northern Ireland have received a threatening email this morning”.

“We recognise the concern this may cause for school leaders, staff, pupils and families,” they said.

“We are engaging closely with the PSNI and will act on their advice. Communications have been issued to schools, and we continue to support school leaders and keep them informed.”