Sonnenburg concentration camp was opened on 3 April 1933 in Sonnenburg in a former prison, on the initiative of the Free State of Prussia Ministry of the Interior and Justice.

Vulkanwerft concentration camp in the Bredow district of Szczecin, also known as the KZ Stettin-Bredow, was one of the early so-called "wild" German Nazi concentration camps set up by the SA, in October 1933. The camp existed only until 11 March 1934, before prisoner transfer, and in spite of its short history, had as many as three commandants including SS-Truppführer Otto Meier, SS-Truppführer Karl Salis, and SS-Truppführer Fritz Pleines. The camp was notorious for the brutality of its guards. The prisoners were kept in the basement of the shipyard buildings.