Uprava državne bezbednosti/sigurnosti/varnosti or UDBA (Serbian Cyrillic: Управа државне безбедности, УДБА; literally: State Security Administration) was the secret police organization of the Socialist Federal Republic of Yugoslavia. It is alleged that the UDBA was responsible for the eliminations of dozens of enemies of the state within Yugoslavia and internationally (estimates about 200 eliminations and kidnappings). Eliminations vary from those of notorious war criminals (e.g. Vjekoslav (Maks) Luburić and Ante Pavelić) in Spain and Argentina to those of the Croatian emigrant and secessionist Bruno Bušić on October 16, 1978 in Paris.
arkan got his start workin for them, ironically enough killing serbian nationalists...how things change:)