A percentage of Muslims served in Nazi ''Waffen-SS'' units. These units were responsible for massacres of Serbs in northwest and eastern Bosnia, most notably in Vlasenica. On 12 October 1941, a group of 108 prominent Sarajevan Muslims signed the Resolution of Sarajevo Muslims by which they condemned the persecution of Serbs organized by the Ustaše, made distinction between Muslims who participated in such persecutions and the Muslim population as a whole, presented information about the persecutions of Muslims by Serbs, and requested security for all citizens of the country, regardless of their identity.