A 31 January 1938 resolution by Central Committee of the Communist Party of the Soviet Union to extend the National operations of the NKVD until 15 April for the destruction of Polish, Latvian, German, Estonian, Finnish, Greek, Iranian, Harbinian, Chinese and Romanian "spy-saboteur contingent" signed by Joseph Stalin, Vyacheslav Molotov, Lazar Kaganovich, Kliment Voroshilov, Anastas Mikoyan and Vlas Chubar