The Bijeljina massacre involved the killing of between 48 and 78 civilians by Serbparamilitary groups in Bijeljina on 1–2 April 1992 during the Bosnian War. The majority of those killed were Bosniaks (or Bosnian Muslims). Members of other ethnicities were also killed, such as Serbs deemed unloyal by the local authorities. The killing was committed by a local paramilitary group known as Mirko's Chetniks and by the Serb Volunteer Guard (SDG, also known as Arkan's Tigers), a Serbia-based paramilitary group led by Željko Ražnatovic (aka Arkan). The SDG were under the command of the Yugoslav People's Army (JNA) that was controlled by Serbian PresidentSlobodan Miloševic.