The two ships left Irish waters last night, according to the Defence Forces.
A midlands Independent TD says Ireland has 'very little capability' to counter any threat from Russian ships.
The Defence Forces confirmed last night that two Russian ships which were travelling in the waters close to Galway and Kerry, had left Irish waters.
Both vessels had the capability to interfere with sub-sea cables.
The Irish Air Corps and Naval Service were monitoring them before they left Ireland's Exclusive Economic Zone.
Kildare South Deputy and former Army Ranger Cathal Berry says crewing issues meant the ships couldn't be properly monitored.
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