Dissident republicans have been blamed for an attempted bomb attack on a PSNI police station in the border village of Roslea on Saturday night.
The device was in a car which was abandoned outside the barracks in the village. A man got out of the vehicle on Saturday evening, shouted a warning and made off on foot.
The device which was said to contain 130 pounds of explosives, was defused.
The attempted bombing is believed to be the work of a unit of dissident republicans who have been active in border areas of Fermanagh in the past.
PSNI Chief Constable Hugh Orde said dissident republicans still pose a significant threat.
``If you look at the work we have done and the Garda Siochana have done, there are a lot of dissidents in prisons north and south of the border,'' he said.
``But, in a way, the more successful we become, the more dangerous that small minority becomes.''