Two men in their 30s have been arrested in Aughrim in Co Galway following the discovery of cannabis plants and cannabis herb by gardaí on Saturday.
The drugs have a street value of about €166,000.
The two men remain in custody under Section 2 of the Criminal Justice (Drug Trafficking) Act, 1996.
Gardaí searched the residence as part of Operation Tara.
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Meanwhile, a man in his 40s was arrested by gardaí in Ballinasloe after the seizure of €35,000 worth of cannabis herb and €7,510 in cash in a separate search on Saturday afternoon. Cannabis jellies were also seized.
The man was detained under the provisions of Section 4 of the Criminal Justice Act, 1984. He was released on Saturday evening without charge and a file will be prepared for the Director of Public Prosecutions.
All drugs will be forwarded for analysis.
Investigations are continuing on both cases, says An Garda Síochána.