The vessels are being monitored off the south-west coast.
Ireland has left itself 'quite vulnerable' to Russian ships that have sailed into Irish waters.
That's the view of Cork South West TD Michael Collins as the Air Corp and Naval Service monitor the vessels off the south-west coast.
He says the country doesn't seem to have suitable aircraft to watch them.
Deputy Collins says the Russian ambassador must be asked to explain his country's actions:

Survivors’ Stories And Counselling Gave Kildare Woman Maeve Leahy Strength To Speak Out About Abuse
€34.5m Boost Backs Quest To Study Memory Loss And Build 3-D Biodegradable Spinal Supports
13 New Gardaí For Kildare - But No Increase For Part-Time Maynooth Station
Kildare’s Rain Warning Brought Forward To 9am As Remnants Of Storm Claudia Approach Ireland
Christmas Gift Caution As E-Scooters Leading Cause Of Child Brain Injuries
€540k Worth Of Ketamine Seized In Major Kildare Raid
Mother Of Late Harvey Morrison Focused On Change For Children With Spina Bifida And Scoliosis