Four people have been arrested as part of an investigation into the INLA.
The men were arrested by the Paramilitary Crime Task Force in West and North Belfast.
Six properties were searched as part of the operation which is focused on the criminal activities of Belfast INLA.
A number of items, including a firearm and suspected Class A drugs, were seized and will be sent for forensic examination.
PSNI Detective Superintendent Bobby Singleton said all four men were arrested under the Terrorism Act and have been taken to Musgrave Serious Crime Suite for questioning.