Three gardaí who were arrested yesterday have now been released without charge.
Yesterday morning, a superintendent was arrested on suspicion of disclosing information.
An inspector was detained for suspected breach of provisions of the Misuse of Drugs Act, while a detective was arrested on suspicion of conspiracy to pervert the course of justice.
The arrests were made as part of an operation linked to an investigation into a Limerick criminal gang.
Early this morning, the superintendent was released without charge.
The force says he was immediately suspended from duty following the release, and a file is being prepared for the Director of Public Prosecutions (DPP).
Meanwhile, the detective has also been released and remains suspended from duty.
Their respective periods of detention had previously been extended.
It was confirmed yesterday evening that the inspector had been released without charge.
He's also been suspended from duty, and a file will be prepared for the DPP.
