A cannabis growing operation was discovered when gardaí searched a house in Dromiskin, Co Louth on Monday.
Gardaí based in Ardee said 43 mature cannabis plants were discovered during the operation.
A “significant quantity” of harvested cannabis was also seized during the raid, the force said.
The plants were stored close together in a small heated room, along with several fans, according to photographs released by the Garda Press Office.
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The estimated total street value of the seizure was €40,000.
“No arrests have been made and investigations are continuing,” a Garda spokesman said.