Carbon monoxide, an orderless, colorless gas, and hydrogen cyanide, were used to poison millions of camp prisoners. Carbon monoxide robs the victim's organs of oxygen, while hydrogen cyanide blocks the absorption of oxygen by the bodies tissues. In camps at Belzec, Sobibor and Treblinka, carbon monoxide was used as the primary gas in the chambers. The SS were deceitful in luring victims to their deaths. Those who inhaled either gas suffered tremendously. They were dead in 20-30 minutes. Majdanek camp was the only extermination camp to use carbon monoxide and hydrogen cyanide gas. It was reported that about 1,000 Jews a day were put to death. Carbon monoxide was pumped through storage containers while Zyklon B pellets were dropped through holes in the ceiling. Auschwitz camp also used Zylkon B as their primary poison gas, because it was inexpensive and easy to deliver. Most importantly, it killed faster than carbon monoxide. The gas chambers and crematoriums at Auschwitz were filled with victims. Over 1.25 million people were exterminated at Auschwitz, the vast majority were Jews.