Two men and a woman have been arrested by gardaí investigating the activities of dissident republicans and criminal gangs in Dublin.
A number of searches were carried out this morning.
Over 100 gardaí from the north city with officers from the Special Detective Unit along with the Dog Unit were involved.
The searches were carried out in central Dublin, Donaghmede and Artane.
A small number of 9mm rounds of ammunition were found in a shed at the back of a pub in the city.