The drugs were discovered at a property in Athy.
€7m worth of cannabis has been seized in the Midlands.
The drugs were discovered at a property in Athy as gardaí carried out a number of searches in the county yesterday.
Three men in their 30s and 40s and a woman in her 20s were arrested at the scene. They're being held at garda stations in the Eastern region.
An incident room has been set up at Carlow Garda Station.
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