A man was arrested under Section 41 of the Terrorism Act 2000 after police searched a property in Londonderry.
He is also linked to a hoax security alert last month on Lone Moor Road, Derry/Londonderry. A suspicious object was found near Celtic Court, causing major chaos for locals and football fans heading to the Derry City vs Shamrock Rovers match.
The suspect is now in custody at Musgrave Serious Crime Suite, where detectives are grilling him.