Prime Minister. Kosovo held its first free, Kosovo-wide elections in late 2001 (municipal elections had been held the previous year). UNMIK oversaw the establishment of a professional, multi-ethnic Kosovo Police Service. In March 2004, Kosovo experienced its worst inter-ethnic violence since the Kosovo War. The unrest in 2004 was sparked by a series of minor events that soon cascaded into large-scale riots. Kosovo Albanians mobs burned hundreds of Serbian houses, Serbian Orthodox Church sites (including some medieval churches and monasteries) and UN facilities. Kosovo Police established a special investigation team to handle cases related to the 2004 unrest and according to Kosovo Judicial Council by the end of 2006 the 326 charges filed by municipal and district prosecutors for criminal offenses in connection with the unrest had resulted in 200 indictments: convictions in 134 cases, and courts acquitted eight and dismissed 28; 30 cases were pending. International prosecutors and judges handled the most sensitive cases. Recent history (1999 to present) The war ended on 10 June 1999 with the Serbian and Yugoslav governments signing the Kumanovo Agreement which agreed to transfer governance of the province to the United Nations. A NATO-led Kosovo Force (KFOR) entered the province following the Kosovo War, tasked with providing security to the UN Mission in Kosovo (UNMIK). Before and during the handover of power, an estimated 100,000 Serbs and other non-Albanians, mostly Romani, fled the province for fear of reprisals. In the case of the non-Albanians, the Roma in particular were regarded by many Albanians as having assisted the Serbs during the war. Many left along with the withdrawing Serbian security forces, expressing fears that they would be targeted by returning Albanian refugees and KLA fighters who blamed them for wartime acts of violence. Thousands more were driven out by intimidation, revenge attacks and a wave of crime after the war as KFOR struggled to restore order in the province. Large numbers of refugees from Kosovo still live in temporary camps and shelters in Serbia proper. In 2002, Serbia and Montenegro reported hosting 277,000 internally displaced people (the vast majority being Serbs and Roma from Kosovo), which included 201,641 persons displaced from Kosovo into Serbia proper, 29,451 displaced from Kosovo into Montenegro, and about 46,000 displaced within Kosovo itself, including 16,000 returning refugees unable to inhabit their original homes. Some sources put the figure far lower; the European Stability Initiative estimates the number of displaced