The prime minister of Bosnia's Serb half said on Friday he would pull out of talks on constitutional reform led by the United States and European Union set to speed up Bosnia's path to EU and NATO membership.

Milorad Dodik was the first to reject a EU-U.S.-proposed constitutional reform package this month.

Dodik then invited rival leaders to come to Banja Luka -- a town 200 km northwest of Sarajevo -- on Friday to start negotiations without international mediation.

But only officials of two small parties appeared.

"This is not my defeat," Dodik said. "It's a defeat of politicians from the federation who agree to meet only in the presence of the international community. I will never again take part in any talks mediated by the international community."

Postwar Bosnia is made up of the Serb Republic and the Muslim-Croat federation under the Dayton peace accords that ended the 1992-95 war that witnessed Serb genocide against Muslims.

"This is the beginning of political chaos in Bosnia- Herzegovina in which local leaders have become disoriented and the international community is losing patience," said Gojko Beric, an analyst who is the author of "Letters to the Celestial Serbs: Reflections on an Ethnic Conflict."

Beric said further dialogue involving the leaders and international community is badly needed to break the political deadlock but that constant bickering between rival leaders does not leave much reason for optimism.

The U.S. and EU-proposed reforms package included measures to end Bosnia's status as an international protectorate and constitutional changes to help make it a credible EU and NATO candidate.

The talks on Bosnia's future mediated by EU and U.S. senior officials ended without breaking the stalemate in the country.