Two men are due in court in Dublin this evening in connection with an investigation into dissident republican activity in the West.
The men - one in his late 20s, the other in his 30s - were arrested in Clogher, Claremorris in Co Mayo on Saturday after gardaí raided a house.
Officers discovered explosive substances as well as component parts for bomb-making.
The men are due before The Special Criminal Court at 7pm.