Police have searched more than 20 homes and business premises in County Tyrone and Belfast in an investigation into dissident republican activity.
The searches, by the PSNI's Organised Crime Squad, were concentrated in Strabane.
Searches also took place on the Falls Road in Belfast and in Castlederg.
No arrests were made, but cash and cigarettes, along with computer equipment and a large amount of documentation, were recovered.
Police said the searches were "part of an ongoing investigation into an organised criminal network" operating in Strabane.