A man in his 30s is due in court in connection with the seizure of a loaded gun in Dublin on Friday.
Ammunition was also discovered when a premises was raided in Clondalkin, while two men were arrested.
Gardaí said that the intelligence-led operation has prevented a potential shooting.
The man is due to appear before the Criminal Courts of Justice at 10.30am this morning.
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Another man in his 20s, also arrested as part of the investigation, remains in custody.