The Brigades de Recherche et d'Intervention (Research and Intervention Brigades, BRI), often called "Anti-Gang Brigades", are elite police specials units of the French Ministry of the Interior (Ministère de l'Intérieur).
They are specialised in very serious cases of robbery, or hostage kidnappings for the BRI of the Préfecture de Police de Paris (BRI-PP). They typically attempt to catch offenders in the act after monitoring their activities for some time.
The units have very modern equipment and are also in charge of collecting and archiving data about banditry.