The man was arrested under the Terrorism Act, and is being questioned at Musgrave Serious Crime Suite in Belfast.
Searches were also carried out at two addresses, and a number of items seized.
The arrest is part of an investigation following on from a public safety operation in Derry on Tuesday, 21st May, which resulted in the seizure of an AKM firearm and a quantity of ammunition.
As part of the investigation two men, aged 56 and 59, were charged with offences to appear before Derry Magistrates’ Court on Friday 24th May.
Tags: