Two men have been arrested as part of an ongoing investigation into the activities of dissident republicans.
A man in his 30s was arrested when gardaí searched a house in Meath.
A second man, also in his 30s, was arrested during a search of a house in west Dublin.
They are both currently detained under Section 30 of the Offences against the State Act, 1939, in a west Dublin Garda station, and can be held for up to three days.
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The operation was led by members of the Special Detective and Emergency Response Units.