SARAJEVO, Bosnia-Herzegovina - Election results announced by international officials Friday confirmed the victory of the extreme nationalist candidate, Nikola Poplasen, as president of the Bosnian Serb half of this country.

While Poplasen and those who support him are seen by American and European diplomats as hard-line opponents of Western efforts here, the results in most other races show a trend in favor of moderate politicians, international officials said.All three of the major ethnically based political parties that once held monolithic power over Bosnia's three ethnic groups saw their power eroded by voters, the international officials who conducted the elections said.

"For the first time in seven years, since before the war, the people of Bosnia are not represented almost exclusively by three dominant political parties, each one of them coming from a single ethnic group," said Zlatko Lagumdzia, president of a moderate multiethnic party that gained considerably in the election.