A MAN is being questioned in connection with an alleged dissident republican operation to stake out a garda station.
The 23-year-old was arrested by the Special Detective Unit (SDU) in Dublin.
The man has been detained in Ballymun garda station under Section 30 of the Offences Against the State Act 1939.
He was the third person to be arrested in connection with the alleged attempt to spy on Harcourt Square garda station in Dublin city centre. The incident occurred in September last year.
Harcourt Square is the Dublin Metropolitan Region Headquarters and houses several specialist units including the SDU, which investigates dissident activity.
It also houses the National Bureau of Criminal Investigation, Organised Crime Unit, Emergency Response Unit and Garda Bureau of Fraud Investigation.
Detectives investigating the activities of dissident republicans searched a room in the Harcourt Hotel, near the garda headquarters in Dublin, and found surveillance equipment, including a digital camera.
Images taken from the seized camera were of some serving officers.
A 32-year-old who was arrested in connection with incident was subsequently released. A file is being prepared for the Director of Public Prosecutions.
Corey Mulhall (41), of Daletree Court, Ballycullen, Co Dublin, appeared before the Special Criminal Court in October charged with membership of the IRA following the incident. The case is ongoing.