A garda arrested on suspicion of firearms offences has been released without charge and suspended from the force.
A file on the case is now being prepared for the Director of Public Prosecutions.
The garda, who is in his 20s, was arrested in public while he was with a number of friends in Dublin on Thursday last. It is understood he is a member of a gun club with a firearms licence and has no links to organised crime.
Gardai found no links between the man and organised crime or dissident republicans.
However, he is a gun enthusiast and has a firearm licence.
While he is legally allowed to store ammunition in his home, it is believed that extra ammunition was found during the raid and gardai took away several other items for forensic examination.
Gardai from the National Bureau of Criminal Investigation are leading the investigation and the officer was questioned at Irishtown Garda Station in south Dublin following his arrest.
He was released on Saturday night.
The garda is a probationer who joined the force only within the last year.
The man had previous firearms training before becoming a trainee garda.
The investigation is being conducted under the direction of Assistant Garda Commissioner John O'Driscoll.
The garda was the second probationer arrested during the week.
Another officer, who is also in his 20s, was held in the south of the country on Thursday.
He was questioned in relation to money that went missing from a wallet handed into the station where he worked.
He was later released without charge while a file is prepared for the DPP.