The UN war crimes court's chief prosecutor, Carla Del Ponte, last week slammed Bosnian Serbs over lack of cooperation with The Hague-based tribunal.
Del Ponte said Bosnia and Bosnian Serbs needed to be "more pro-active in tracking down war crimes indictees" because efforts thus far were "not satisfactory."
The UN war crimes tribunal is still seeking the arrest of six war crimes suspects, including former Bosnian Serb political leader Karadzic and his wartime military commander Mladic.
Karadzic and Mladic are wanted for genocide during Bosnia's 1992-95 war, notably the Srebrenica massacre of more than 8,000 Muslim men and boys.
Mladic is widely believed to be hiding in Serbia, while Karadzic is thought to spend his time between Bosnia and neighboring Montenegro.