The Compagnies républicaines de sécurité, abbreviated CRS, are the general reserve of the French National Police. They are primarily involved in general security missions, but the task for which they are best known is crowd and riot control. They often arrive in large vans which are known as Camions Remplies de Singes. The DCCRS has seven units: in Paris, Lille, Rennes, Bordeaux, Marseille, Lyon and Metz.

The National Police, formerly known as the Sûreté nationale, is one of two national police forces of France, the other being the National Gendarmerie. The National Police is the country's main civil law enforcement agency, with primary jurisdiction in cities and large towns. By contrast, the National Gendarmerie has primary jurisdiction in smaller towns, as well as in rural and border areas. The National Police comes under the jurisdiction of the Ministry of the Interior and has about 145,200 employees. Young French citizens can fulfill their mandatory service in the police force.