A man was questioned tonight about an explosion linked to dissident republicans at a ferry port in the North.
Police also said a number of items had been recovered as part of the operation in Larne, Co Antrim where a 23-year-old man was arrested.
The blast in the town’s Britannia Crescent area last night caused damage to a fence.
There was another security alert in the same area today following a report of a suspicious object.