nation bloc, which has been responsible for peacekeeping in the troubled region after the wars of the last decade, said they were "deeply concerned" by del Ponte's assessment to the U.N. Security Council. "(The countries of the Western Balkans) must ... cooperate fully with the International Criminal Tribunal for the Former Yugoslavia, including bringing to justice all those who are indicted by the Tribunal," they said in a statement. The tribunal, based in The Hague, was formed 10 years ago to prosecute war crimes and human rights violations during the wars of the 1990s that accompanied the break-up of Yugoslavia. Del Ponte is under pressure from the Security Council to wrap up all investigations by the end of 2004, finish all trials by 2008 and close down by the end of 2010. She is considering whether to prosecute Haradinaj for war crimes committed during the 1998-99 Kosovo war, a move which western diplomats say could trigger unrest in the Serbian province, where the alliance has 17,500 troops. Haradinaj is a former regional commander of the Kosovo Liberation Army, which fought Serbian troops, and is set to become prime minister under a coalition deal that parliament is expected to vote on this month after elections in October. --More 2136 Local Time 1836 GMT