The Special Detective Unit and its subsections operate under the command of the Crime and Security Branch (CSB).
[4] The CTI operates its own specialist surveillance unit and officers work closely with western international security and intelligence services.
[3] The Counter-Terrorism International unit also manage their own informants via the Covert Human Intelligence Sources (CHIS) system, administered by Garda HQ.
[5] Detectives from the Garda CTI assisted with the investigation into the 2015 Sousse terrorist attacks in Tunisia where 3 Irish citizens were killed.
[6] It has also sent members to Greece alongside officials from the Department of Justice to assist in the vetting process for refugees seeking status in Ireland.