Five people remain in custody today in connection with a Garda operation targeting dissident republicans and criminal activity in Dublin.
Seven guns as well as ammunition were seized as part of the operation.
A Garda spokesman said the force’s Special Detective Unit arrested the four men and a woman in Dublin city on Sunday night.
Four of those arrested are aged in their 20s and one of the men is in his 60s.
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One of the men is being held in Shakill Garda station, two others in Terenure Garda station, and the other man and woman in Blackrock Garda station.
They are all being held under Section 30 of the Offences Against the State Act.