Ypatingasis būrys ("Special Squad") or Special SD and German Security Police Squad (, , also colloquially "strzelcy ponarscy" ("Ponary riflemen" in Polish) (1941–1944) was a Lithuanian killing squad also known as the "Lithuanian equivalent of Sonderkommando", operating in the Vilnius Region. The unit, primarily composed of Lithuanian volunteers, was formed by the German occupational government and was subordinate to Einsatzkommando 9 and later to Sicherheitsdienst (SD) and Sicherheitspolizei (Sipo). The unit was subordinated to German police, and had no official autonomy.