A man and a woman are due to appear in court in Dublin today charged with firearms and drug offences.
The charges come after a Garda operation on Monday observed a semi-automatic shotgun being handed between two vehicles in Finglas in north Dublin.
Both vehicles were subsequently stopped and the firearm recovered.
A 31-year-old man and a 53-year-old woman were arrested and were questioned under Section 30 of the Offences against the State Act.
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Follow-up searches led to the seizure of cocaine worth an estimated €140,000 and heroin with a mixing agent work an estimated €900,000.