The Special Detective Unit carried out the raid.
Three men in their forties and fifties have been arrested in the midlands in a search targetting dissident Republican groups.
The Special Detective Unit, backed up by armed officers and garda dogs carried out the raid.
All three men have been detained under Section 30 of the Offences Against the State Act, which means they can be held for up to 3 days.
They've being held in Dublin as searches continue -- with Gardaí saying this remains a "live operation".
Ploughing Live 2026 Day Two: Thousands Returning To Offaly For Celebration Of Rural Life
Man Arrested In Ploughing Championship Public Order Incident
GardaĆ Issue Public Appeal Over Missing Westmeath Teen
Ploughing Live 2026 Day One: As It Happened
Over 1,800 People Affected By Power Outage in Laois
Offaly TD Reassures Solar Panel Homeowners Payment Scheme Not Set To Be Scrapped
Sinn Fein Setting Back Irish Unity - Taoiseach
Development Project For Offaly Town Enters Next Stage