Two men remain in custody after a car with explosives was stopped on the Naas Road in Dublin last night.
The men, aged in their 30s and 40s, were arrested as part of an operation by officers investigating the activities of dissident republicans.
Acting on intelligence, armed officers from the Emergency Response Unit stopped a car just before the Long Mile Road junction at around 7pm.
The area was sealed off after commercial explosives and other items were discovered in the boot.
The Army Bomb Disposal Team declared the area safe three hours later and the material was handed over to gardaí as evidence.
The men, both from Dublin, are being held at Ballyfermot and Ronanstown garda stations.
One is known to gardaí.
Detectives believe the men are connected to the dissident republican group styling itself the New IRA, which claimed responsibility for the bomb attack in Belfast last month which killed prison officer Adrian Ismay.
Gardaí and the PSNI had warned dissident republican groups could increase their activities to coincide with the anniversary of 1916.