Bahnschutzpolizei

Bahnschutzpolizei (BSP) "(Railway Protection Police)" in Nazi Germany was made up of full-time and part-time police officers who were employees of the "Reichsbahn" (state railways). The "Bahnschutzpolizei" was tasked with railway safety and also with preventing espionage and sabotage of railway property. It was not subordinated to Hauptamt Ordnungspolizei, only the Deutsche Reichsbahn.
Origins.
The BSP was founded in 1939 after a merger of the Bahnpolizei (Railway Police) and the "Reichsbahnschutz" (Railway Protection Force). The former railway police formed the permanent cadre, while the bulk of the organization consisted of the former railway protection men, railway employees who alongside their day-time job served as a security force.
Organization.
The BSP was a special police organization "(Sonderpolizei)" completely subordinated to the Deutsche Reichsbahn. It was not dependent on Ordnungspolizei. During World War II most of the BSP personnel were mobilized and used as a permanent railway security force in the occupied Eastern Europe. As a replacement within Germany, the "SS-Bahnschutz", a railway security force under the SS was founded in 1944.