Three men continue to be questioned by Gardai this morning in connection with the discovery of a drugs processing plant in Dublin.
Gardai say they uncovered a major cocaine preparation factory following a number of raids in the south of the city.
Four people in total were arrested during the operation in south and west Dublin on Friday evening.
A man in his late thirties who was detained following searches of a house in Tallaght has since been released, and a file is being sent to the Director of Public Prosecutions.
Gardai are continuing to question two men following a raid on a warehouse on the Greenhills Road in Walkinstown, where Gardai uncovered a cocaine factory operated by a major south Dublin gang.
Around half a million euro worth of the drug was discovered, along with several firearms and hundreds of rounds of ammunition.
Detectives are also questioning a 28-year-old man who arrested at a house in Clondalkin during the same garda operation.