BELGRADE, Serbia (CBS)
Serb rioters broke into the U.S. Embassy Thursday and set fire to an office after a massive protest against Kosovo's independence that drew an estimated 150,000 people.
Masked attackers broke into the building, which has been closed this week, and tried to throw furniture from an office. A blaze broke out inside one of the offices. Riot police drove armored jeeps down the street and fired tear gas to clear the crowd.
The neighboring Croatian Embassy also was attacked by the same group of protesters.
In Washington, State Department spokesman Sean McCormack strongly urged the Serbian government to protect the U.S. Embassy. He said the U.S. ambassador was at his home and was in contact with U.S. officials.
More than a dozen nations have recognized Kosovo's declaration of independence on Sunday, including the United States, Britain, France and Germany.
But the declaration has been rejected by Serbia's government and the ethnic Serbians who populate northern Kosovo. Russia, China and numerous other nations have also condemned the declaration, saying it sets a precedent that separatist groups around the world will seek to emulate.