During the Volhynian Genocide, commencing in 1943, Sarny was a shelter for ethnic Polish population of Volhynian countryside, massacred by the Ukrainian Insurgent Army. In May 1943, German authorities created a Polish police unit, which defended the town from the Ukrainians. In 1944, most Poles were transported either to the General Government, or to the Third Reich as OST-Arbeiters.