Nine people have been arrested as part of an investigation into paramilitary activity.
It followed a cross-border operation by the PSNI and the gardai today and yesterday.
Seven searches were carried out in Donegal and Dublin, targeted at illegal drug crime linked to the INLA.
A number of electronic devices were seized, and eight men and one woman were arrested in Derry.
Cannabis, controlled drugs and a large amount of cash was also seized as part of the two-day operation.
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