My name is Michael Weinstein. A sister of my maternal grandmother and some members of her family had lived in Ostrog in the Volyn region of Ukraine (formerly Russia and Poland) until June 1941. The Nazis attacked the village and the family escaped by train to Eastern Russia. They survived and after WWIi migrated to Palestine, later Israel. However, I have no information on the whereabouts during the 3-4 years in Eastern Russia. The main two surnames were Guzman (Guz) and Weinshelboim. Does anyone have suggestions on where to find records or information of where Jewish refugees were detained by the Russians during WWII? Thank you?