From Wikipedia Entry on Ponary (The Forest outside of Vilna)
The Ponary massacre or Paneriai massacre (Polish: zbrodnia w Ponarach) was the mass-murder of 100,000 people, mostly Jews and Polish intelligentsia, by German SD, SS and Lithuanian Nazi collaborators Sonderkommando collaborators (Special SD and German Security Police Squad Ypatingasis b?rys units) during World War II and the Holocaust in Reichskommissariat Ostland. The executions took place between July 1941 and August 1944 near the railway station of Paneriai (Polish: Ponary) – a suburb of Vilnius, Lithuania. Some 70,000 Jews were murdered in Ponary,[7] along with estimated 20,000 Poles[ and 8,000 Russians, many from nearby Vilnius.