The men are being held at an unspecified Dublin Garda station.
Two men - both aged in their 40s - were arrested in Dublin on Tuesday morning by the An Garda Síochána Special Detective Unit, in connection with an attempted bombing in Belfast.
The Special Detective Unit is Ireland's primary counter-terrorism and counter-espionage investigative unit.
This morning's arrests are linked to enquiries being carried out by An Garda Síochána and the Police Service of Northern Ireland (PSNI) into the discovery of an under-vehicle explosive device at Shandon Park Golf Club, Belfast on 1 June 2019. An off-duty PSNI officer discovered the bomb beneath his car while it was parked outside the golf club.
The two men are being detained under Section 30 of the Offences Against the State Act at a Dublin Garda Station.
The arrests follow
a separate incident on Monday in which an explosive device unexpectedly detonated in Fermanagh after the PSNI were called out to investigate.
PSNI Deputy Chief Constable Stephen Martin said of the incident: "The initial report received by police indicated that a device had been left on the Wattlebridge Road, however, the explosion occurred on the main A3 Cavan Road.
"While this investigation is at a very early stage, I am of the firm belief this was a deliberate attempt to lure police and ATO colleagues into the area to murder them."
