Three men are due in court in the morning, charged in connection with a drug seizure in Dublin.
More than 800 cannabis plants worth €640,000 were found following searches in the capital and in County Wexford.
A cannabis cultivation unit was discovered in a commercial premises in Dublin's north inner city.
Two others have been released without charge and a file will be prepared for the Director of Public Prosecutions.
Four people remain in custody tonight.