A man and a woman were arrested after gardai seized two guns and ammunition in north Dublin.
The arrests came as a part of Operation Tara which targets drugs-related criminal activity.
A male cyclist, 40s, was stopped by officers in Shangan Gardens, Ballymun on Thursday evening shortly after 11pm.
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He was arrested after gardai found a loaded firearm and he is currently detained under Section 30 of the Offences against the State Act, 1939, at Ballymun Garda Station.
As part of a follow-up search, gardai found a machine pistol, two loaded magazines, two silencers and a quantity of ammunition at a house in Finglas on Friday.
A woman in her 50s was arrested and is also currently detained under Section 30 of the Offences against the State Act, 1939, at Ballymun Station.
A garda spokesman said: "All of the items seized will be sent for ballistic and forensic examination. Investigations are ongoing."
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