A building housing the Serbian Roma Union party's headquarters was vandalized overnight with painted threats, curses and swastikas, the group said Friday, according to dpa. Rajko Djuric, the party's president, blamed a "fascist" mood of intolerance reminiscent of Slobodan Milosevic's regime as hardline nationalist politicians seek to form Serbia's next government. "I'm not surprised by this, having in mind the country we live in. We live in a pig sty," he told Deutsche Presse-Agentur dpa. Unidentified people painted swastikas and wrote insults on the building in downtown Belgrade during the night. Police were investigating. Djuric used to be a member of parliament, but his party won too few votes to get seats in the new legislature Serbs elected on May 11. Anti-Roma actions are not uncommon in Serbia. A Roma boy was killed several years ago by a group of skinheads. Last October, neo-Nazis planned a march in Novi Sad, a city that was the scene of a 1942 Nazi massacre of Jews, Serbs and Roma during World War II. Serbia also had a dirty election campaign this spring, with politicians hurling vicious insults and accusations at each other. President Boris Tadic, a pro-European whose bloc won the most votes in the parliamentary election, was branded a traitor by opponents for engineering a pre-membership Stabilization and Association Agreement with European Union. Serbia's Socialists, a party founded by Milosevic, emerged as kingmaker for the next government since Tadic's bloc and anti-Western parties fell short of a majority to form a government. The anti-Europe bloc, led by Prime Minister Vojislav Kostunica and the ultra-nationalist Radical Party, reached a deal this week to form the Belgrade city government - an alliance many analysts see as a prelude to an anti-European government for Serbia.