The Glinciszki massacre () or the Glitiškės massacre () was a mass murder of Polish civilians by the German-subordinated 258th Lithuanian Police Battalion, committed on 20 June 1944 in the Glitiškės village (; in interwar Second Polish Republic, war-time Generalbezirk Litauen, post-war Lithuanian SSR, now Lithuania) during World War II. In the massacre 39 civilians were murdered including 11 women (one in an advanced stage of pregnancy), 11 children, and 6 elderly men. They were executed as a collective punishment for the death of four Lithuanian auxiliary policemen the previous evening. In revenge, the Home Army (, abbreviated AK) brigade of Zygmunt Szendzielarz killed at least 68 Lithuanian civilians, three-quarters of which were women and children, by the end of June 1944 in Dubingiai and its surroundings as part of the Dubingiai massacre. Prelude Before the war, the Glitiškės village consisted of a large estate, the centre of which was the manor house of the Jeleński family, surrounded by farm buildings and a landscape park. Near the manor house was the Glitiškės Annex, where most of the employees of the manor lived. Glitiškės was located on the Polish side of the pre-war Polish-Lithuanian border, it was a mixed nationality region, where national self-identification was fluid and some of the respondents tended to identify with the current state authority, which then translated into their declared nationality, therefore, the results of the German census of 1916 seem to be relatively reliable. According to it, in the Širvintos district, which included Glitiškės, Poles made up 74.2%, while Lithuanians accounted for 19.9%. The Polish census of 1919 estimated the percentage of Poles in Paberžė municipality, which included Glitiškės, at 94%. According to the Polish geographer Stanisław Gorzuchowski, Poles made up 87,7% of the population in 1928. In contrast, it is recorded in the census of 1942, conducted by the occupational German authorities, that in the same municipality, Poles were 52,5% of the population and Lithuanians were 41,7%. However, this census cannot be considered reliable because it was taken during a period of heightened terror against the Polish population, just seven days after the May 20, 1942 murder of Poles in the Švenčionys district by Lithuanian police. By various means, the Lithuanians spread rumors that after the elimination of the Jews, the next to be exterminated would be Poles. It is also believed that the results themselves were falsified by the administration. After the outbreak