Three men are due to appear in Portlaoise District Court today charged in relation to the massive seizure of drugs near Tullamore on Tuesday.
The trio were arrested and brought to Tullamore Garda station after Gardai discovered 5,000 cannabis plants with an estimated street value of €1.5 million in Durrow.
The drug cultivating operation is one of the biggest discovered in the history of the state.
The three men arrested are non-nationals. Two of the men are believed to be in their 20s with the third in his 30s.