Three members of An Garda Síochána have been arrested amid an ongoing investigation.
The officers, including a superintendent and an inspector, were detained during an operation led by the Assistant Commissioner of An Garda’s Special Crime Operations.
The Garda National Bureau of Criminal Investigation and the Garda National Drugs & Organised Crime Bureau were also involved.
A number of searches were carried out as part of the investigation.
The inspector, arrested for suspected breach of provisions of the Misuse of Drugs Act 1977-84, has been released without charge and suspended from duty while a file is prepared for the Director of Public Prosecutions.
A superintendent, arrested for suspected breach of the provisions of section 62 of the Garda Síochána Act 2005, and a member of Garda rank, arrested for suspected conspiracy to pervert the course of justice, have had their periods of detention further extended and remain in custody.
Deputy Commissioner John Twomey earlier said: “An Garda Síochána is fully committed to investigating any alleged wrong-doing or corruption involving Garda personnel, and will work with other relevant agencies in doing so.
“As this is a live and ongoing investigation, it is not appropriate to make any further comment at this time.”