Some media firms evacuated after hoax bomb threats

The Taoiseach (Irish Prime Minister) Micheál Martin described situation as "worrying" adding his government's first priority was the safety of the Irish public.

"Yesterday, there appeared to be coordinated efforts to disrupt air travel," he said.

He was referring to hoax bomb threats which affected 21 flights across Europe on Thursday, including Ryanair and Aer Lingus planes.

Martin told RTÉ it was not yet known if the threats had come from individuals or if it was a "coordinated attack".

"The gardaí, the defence forces, cyber and aviation authorities are working to establish who's behind this, as are their European counterparts," Martin said.