A man who was arrested in Co Tyrone in relation to dissident republican activity over the weekend has been released.
The 26-year-old was detained in the Strabane area. He had been taken to the serious crime suite at Antrim police station for questioning.
Meanwhile, a husband and wife from Derry have appeared in court charged with a number of terrorist offences.
A husband and wife from Derry have been remanded on terrorism charges having appeared today at Derry Magistrates Court.
The two suspects, who were arrested on Monday in Derry, both face charges of possession of explosives with intent to endanger life and possession of items for an act of terrorism.
The 39 year old man faces a further charge of collecting material last year likely to be of use to terrorists.