Police investigating dissident terrorist activity have arrested an 18-year-old man in west Belfast.
A number of items were removed from a house in Forfar Street by detectives for further examination.
The suspect has been taken to Antrim police station for questioning.
Meanwhile, three other men arrested on suspicion of dissident republican activity this week have been released.
A 50-year-old man arrested in the Lancashire area of England on Tuesday morning was released pending a report to the Public Prosecution Service.
Meanwhile, a 41-year-old man arrested on Tuesday on suspicion of dissident republican activity in the Berwick Road area of Belfast on March 30 has been released unconditionally.
And a 44-year-old man arrested the same day in relation to dissident republican activity in Londonderry in 2010 has also been released unconditionally.