The man has been arrested on suspicion of making and possessing explosives under suspicious circumstances.

A 30-year-old man is due to appear in court on Monday.

A 34-year-old man has pleaded guilty to facilitating a criminal organisation to import explosives, firearms and ammunition into the State

The man, in his 40s, was arrested on Wednesday after a device was found during a house search in Keady earlier this week.

It came in support of an operation by gardaí across the border in Co Monaghan.