Around €700,000 of cannabis has been seized in west Roscommon.
The drugs - both cannabis herb and cannabis plants - were found in a property in Loughglynn this afternoon.
It followed a search carried out by the Mayo/Roscommon/Longford Divisional Drugs Unit at around 3.30pm.
It was conducted as part of an ongoing investigation under Operation Tara, targeting suspected growhouses.
A Garda spokesman said: "During the course of the search, a large-scale cannabis cultivation operation was discovered.
"Cannabis plants and cannabis herb with an estimated street value of €700,000 was seized by investigating Gardaí.
"All drugs are now subject to analysis by Forensic Science Ireland.
"Three men (aged in their 30s) were arrested at the scene and are currently detained under Section 2 of the Criminal Justice (Drug Trafficking) Act, 1996, at Garda stations in County Roscommon.
"Investigations are ongoing."
