From the first days of the occupation, Germans imposed brutal terror on the people of Warsaw, directed primarily at the representatives of the Polish political and intellectual Elites, the Jewish community and people who were in any way connected with the activities of the resistance movement. Warsaw's Prisons and detention centres – Pawiak, the investigator's arrest at Daniłowiczowska Street, the Mokotów Prison, and the basements of Sipo's headquarters in Szucha Avenue – were filled with arrested people. Street round-ups, deportations to concentration camps and mass murders became daily occurrences. Executions of Political prisoners from Warsaw were usually carried out in secret in areas inaccessible to bystanders. The places of massacres were, among others: the Sejm gardens at Wiejska Street; Kabaty Forest; Swedish Mountains in Bemowo; Sękocin Forest near Magdalenka; Chojnów Forests near Stefanów; Laski, Wydmy Łuże and Wólka Węglowa on the outskirts of Kampinos; and above all – infamous Palmiry.