In March 1940, the Germans carried out mass arrests of 60 Poles in the town and county. In April 1940 a Nazi ghetto was set up in the Przedborze district for local Polish Jews. Over 120 Poles from Radomsko and the area were murdered by the Russians in the large Katyn massacre in April–May 1940. During the German AB-Aktion, 53 Polish teachers and school principals were arrested on 11 June 1940, and further mass arrests of Poles were carried out in August 1940 and in 1941. The victims were interrogated by the Gestapo, deported to Nazi concentration camps or murdered in the forests near Olsztyn during large massacres carried out in June, July and October 1940 or in the Kopiec district and nearby villages. The ghetto was liquidated in two stages during the Holocaust. The first deportation action took place in early October 1942 with prisoners sent aboard freight trains to the Treblinka extermination camp. On 12 October, approximately 9,000 Jews were deported. A small group of Jewish slave laborers was allowed to stay. They were sent to Treblinka in January 1943. Radomsko was declared "Judenfrei". In retaliation, the unit of Armia Krajowa ambushed and shot the Chief of Gestapo Willy Berger and his deputy Johann Wagner on 27 May 1943. The German pacification action took place on 3 August 1943 in Rejowice. The settlement was levelled; some AK soldiers were captured and brought to Radomsko. The Nazi prison in Radomsko, located at the historic Ratusz, was attacked by AK on the night of 7–8 August 1943; and the prisoners were rescued. The attack was led by "Porucznik" Stanisław "Zbigniew" Sojczyński. There are multiple known cases of local Poles, who were persecuted by the Germans for rescuing Jews.