Sobibór (pronounced [sɔˈbibur]) was a Second World War Nazi German extermination camp located on the outskirts of the village of Sobibór in occupied Poland within the semi-colonial territory of General Government. The camp was part of the secretive Operation Reinhard which marked the deadliest phase of the Holocaust in Poland. Its official German name was SS-Sonderkommando Sobibór. The camp was situated near the rural county's only major town of Włodawa (called Wolzek by the Germans). Jews from Poland, France, Germany, the Netherlands, Czechoslovakia and the Soviet Union, as well as the Soviet prisoners of war, were transported to Sobibór by rail and suffocated in gas chambers fed by the exhaust of large petrol engines. Up to 200,000 people were murdered at Sobibór, and possibly more.