The Siege of Warsaw continued until September 29, 1939. On September 10 alone, the Luftwaffe conducted 17 bombing raids on the city; three days later, 50 German planes attacked the city centre, targeting specifically Wola and Żoliborz. In total, some 30,000 people were killed, and 10 percent of the city was destroyed. Along with the advancing Wehrmacht, the "Einsatzgruppe" EG IV and the Einsatzkommandos rolled into town. On November 7, 1939, the "Reichsführer-SS" reorganized them into local Security Service (SD). The commander of EG IV, Josef Meisinger (the "Butcher of Warsaw"), was appointed chief of police for the newly formed Warsaw District".