Serbian authorities say they have apprehended Goran Hadzic, the only remaining fugitive sought by the United Nations war crimes tribunal

A Serbian official said on Wednesday that the leader of Croatia's rebel Serbs during the country's conflict in the 1990's, has been arrested. No other details were immediately available.

Hadzic went on the run following his 2004 indictment for war crimes and crimes against humanity. He is charged with ordering the killing of hundreds of non-Serbs, as well as deporting thousands.

Hadzic's arrest comes just weeks after the arrest in May of Bosnian Serb military chief Ratko Mladic. Mladic faces life in prison if convicted of charges of orchestrating the Srebrenica massacre and the 44-month siege of Bosnia's capital city, Sarajevo, in which 10,000 people died.

A judge entered a not guilty plea on 11 charges against Mladic earlier this month after he berated judges and refused to enter a plea at his war crimes trial at the Hague.