The Yellow Wasps paramilitary unit was allegedly formed on 12 April 1992 by Brana Grujić, president of the Zvornik
Serbian Democratic Party (SDS), and a man known as Marko Pavlović, commander of the Zvornik Territorial Defense unit (TO), at a session of the Zvornik municipal assembly. Consisting of about seventy men, the unit was commanded by Vojin Vučković, nicknamed "Žućo", born in 1962, an electrician from the town of
Umka, near
Belgrade, martial arts expert and former coach of the
Serbian Interior Ministry judo team. During the ICTY trial of
Momčilo Krajišnik evidence was given that Marko Pavlović was an intelligence officer named Branislav "Branko" Popović, a major with the Zvornik Brigade of the
Bosnian Serb Army who subsequently transferred to the
Serbian army. The "Yellow Wasps" paramilitary group was one of three paramilitary groups responsible for the "ethnic cleansing" and looting of Zvornik. They targeted not just Bosniaks, but anyone rich, including Serbs. They captured the Serbian mayor of Zvornik and tried to take control of the town using weapons from the territorial defence force. The Bosnian Serbs arrested them and sent them back to
Serbia, but they soon returned. ==War crimes==