During World War II , in summer 1941 , 1,500 to 2,000 Jews from Lithuanian shtetls were murdered in mass executions perpetrated by an Einsatzgruppen of local policemen .
During World War II , in summer 1941 , 1,500 to 2,000 Jews from local shtetls were murdered in mass executions perpetrated by an Einsatzgruppen of Lithuanian policemen .