The Jäger Report was written on 1 December 1941 by Karl Jäger, commander of Einsatzkommando 3, a killing unit of Einsatzgruppen A which was attached to Army Group North during Operation Barbarossa. It is the most precise surviving chronicle of the activities of one individual Einsatzkommando. The six-page report was prepared in five copies, but only one survives and is kept by the Central Lithuanian Archives in Vilnius.