The Embassy of Russia in Ireland has warned that the expulsion of four senior Russian officials "will not go unanswered".
On Tuesday afternoon, the four officials were asked to leave the country following security advice and a meeting with the State’s national security team.
Taoiseach Micheál Martin told the Dail: “Four senior officials of the Russian embassy have been asked to leave the State because their activities are not in accordance with international standards of diplomatic behaviour.”