The Defence Forces has said that it is aware and is monitoring two Russian flagged ships off the southwest coast of Ireland.
It was reported that the two ships have the capability to interfere with sub-sea cables.
The ships appeared to depart to Africa last week but turned back again.
In a statement, the Defence Forces said both the Air Corps and the Naval Service continue to monitor activity in Irish waters and to undertake Maritime Defence and Security Operations throughout Ireland's maritime domain.
