Serb protesters attack U.N. police in Kosovo

Pro-Western politicians in Serbia accused hard-line nationalists in the Kostunica's government of inciting the violence.

Parties of Tadic and Kostunica are united in a coalition government that has ruled Serbia since mid-2007. But the two differ sharply on Kosovo, with Tadic saying Belgrade must press on with efforts to join the EU regardless of Kosovo, and Kostunica seeking to drop the bid because most EU countries plan to recognize the province's independence.

Kostunica appealed for an end to the violence.

"This directly damages our ... national interests. All those who support the fake state of Kosovo are rejoicing at the sight of violence in Belgrade," he said. He made no mention of the damaged embassies.

Police said that in addition to the U.S. and Croatian embassies, the missions of Turkey, Bosnia, Belgium and Canada also were targeted.

The U.S. ambassador to Bosnia said he had closed the consulate in the northwestern city of Banja Luka a day after protesters burned the U.S. flag and tried to storm the building.

Bosnia consists of two ministates, one run by Bosnian Serbs, the other by Bosniaks and Croats. The Bosnian Serb parliament has condemned Kosovo's move and said it will consider a referendum to secede from Bosnia if more countries recognize Pristina's government.

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