ELECTRONIC devices and documentation seized in west Cork in recent days has been taken to Dublin for extensive analysis to establish links to criminal activity.
Investigators from the Criminal Assets Bureau will spend weeks going through the materials which were seized, which included phones and computers.
A man who was arrested during the operation, in relation to a drug dealing offence from an earlier date, was questioned before being released without charge.
Chief Superintendent Con Cadogan said a file will now be prepared for the DPP.
Suspected drugs which were seized have also been sent to Forensic Science Ireland for analysis.
More than 20 addresses in west Cork and one in Tipperary were targeted in the early morning raid on Thursday.
Six vehicles were seized during the operation.
Four bank accounts in different financial institutions in west Cork remain frozen as part of the probe.
Financial and business records found in the operation will be scrutinised by investigators to build a picture of the activities of the man at the centre of the probe.
The man is believed to be involved in the sale and distribution of drugs.
He is linked to a number of businesses in west Cork, through which he is believed to be laundering the proceeds of his criminal conduct, namely the supply of controlled drugs through these businesses, according to gardaí.
The operation involved the Criminal Assets Bureau and the Emergency Response Unit and was backed up by the Southern Region Garda Armed Support Unit, the Garda Dog Unit, the Cork Divisional Search Team and local Detective and Uniform Gardai from Cork.
Eleven residential addresses were targeted, along with four business premises, a hotel room and six professional premises, linked to solicitors and accountants.