At first the executions were carried out by shooting; subsequently, however, it is reported that the Germans applied new methods, such as poison gas, by means of which the Jewish population was exterminated in Chelm, or electrocution, for which a camp was organized in Belzec, where in the course of March and April, 1942, the Jews from the provinces of Lublin, Lwow and Kielce, amounting to tens of thousands, were exterminated.