Children during the Holocaust / P. Heberer. – Plymouth, 2011. – p. 481
This branch of the German police comprised the Gestapo (Secret State Police), the Kriminalpolizei (Criminal Police), and the Grenzpolizei (Border Police). As chief of the Sicherheitspolizei as well as the Sicherheitsdienst, Reinhard Heydrich merged the two organizations by establishing the Reich Security Main Office in September 1939. The Sicherheitspolizei helped to supply the forces of the Einsatzgruppen, which served as both security police and mobile killing units in German-occupied territories.
Sicherheitspolizei