One of the main tasks of UNTAES was reform of local police forces in which before the war occurred first inter-ethnic conflicts "(see:Battle of Borovo Selo)". UNTAES initial problem was to replacement of Federal Republic of Yugoslavia symbols. Since there was resistance to that, compromise was reached where UNTAES with financial support of US Department of Justice bought uniforms without any state features. Croatian government initially refused to begin paying salaries to local police but later agreed to do so since it showed return of Croatian sovereignty and responsibility for region. Second problem was the fact that Croatian government refused to pay salaries in Yugoslav dinar while local police didn't want it in Croatian kuna so in the end it was paid in Deutsche Mark. Management of transitional police forces was functioning on the basis of dualism where on each top position in the region there were two individuals, one from Croatian and one from Serbian community, including double commanders of police forces. Support for UNTAES was provided by Polish Special Police Group that made first arrest of an indicated war criminal who was former mayor of Vukovar.