(Above) Jewish deportees from the Lodz ghetto arrive in Chelmno after having been transferred from a closed passenger train to a train of open cars at the Kolo station. Jews taken to this extermination camp are placed in mobile gas vans and driven to a burial place while carbon monoxide from the engine exhaust is fed into the sealed rear compartment, killing them. (Below) A group of Jewish men awaiting death in a gas van.
(Photo credits: top, Jewish Historical Institute, bottom, Main Commission for the Investigation of Nazi War Crimes, both courtesy of USHMM Photo Archives)