Macedonian Prime Minister Nikola Gruevski has claimed victory for his centre-right party in Macedonia’s general elections that were marred by alleged fraud and ethnic violence.

“In most parts the vote was fair and democratic, but sadly in one part there were irregularities,” Gruevski was quoted by Reuters as saying. “I will do everything in my power to have a re-run there so each and every MP is elected fairly.”

The troubled elections day could cloud the country’s ambitions to join the European Union and NATO. The European Union’s executive, the Commission, said it is concerned by the situation.

One person was shot dead and nine people were wounded in the country’s ethnic Albanian areas during voting, the New York Times reported. Thirteen people were arrested after clashes in Albanian areas, Ivica Bocevski, a government spokesman, said in a telephone interview, according to the same source.

“This vote is a tragedy for supporters of Macedonia’s E.U. and trans-Atlantic future,” said Denis McShane, a former Europe minister in Tony Blair’s government in Britain who was in Skopje, Macedonia’s capital, on Sunday as a monitor for the Council of Europe, according to the New York Times. “Nobody can form a government on the basis of an election in which police have stuffed ballot boxes and thugs are attacking polling stations.”

Officials said voting was suspended in 22 polling stations, including in Aracinovo, the place where the Albanian rebels confronted with government forces in 2001, and it would be repeated in those areas.

The conflicts were the result of tensions between the rival ethnic Albanian political parties, the Democratic Union for Integration and the Democratic Party of Albanians.