The exploration was made at a house in Aughavas, near Carrigallen, Co. Leitrim.
During the progression of the search a highly sophisticated grow house was discovered which had all over 250 cannabis plants growing (subject to analysis) at a mature phase of growth.
The plants have an estimated street value of €200,000.
One man in his early 50s was caught and is currently detained at Carrick-on-Shannon Garda Station under Section 2 of the Dishonest Justice (Drug Trafficking) Act, 1996.
The house is sealed off for a forensic technical assessment which is taking place at this time.