Thousands of supporters of Bulgaria's ultra-nationalist pro-Russian Vazrazhdane (Revival) party fought with police on February 23 as they attempted to storm the European Union mission in Sofia during a protest against the country's planned adoption of the euro.

The anti-government protesters, chanting "Resignation" and "No to the Euro", threw red paint, firecrackers and Molotov cocktails at the EU building in the capital Sofia, setting the front door on fire before the police pushed them away.

Police said that several demonstrators had been arrested, while some officers had been injured during the clashes. View on euronews

If there is no referendum, we will block the work of the National Assembly,” said Kostadinov, whose party is the third largest in parliament. Bulgaria, which joined the EU in 2007, has been plagued by political instability over the last several years.

Supporters of Bulgaria's pro-Russian party Vazrazhdane (Revival) clashed with police and set fire to the entrance of the European Commission building in Sofia on February 22. The incident occurred during a protest against Bulgaria's adoption of the euro.

Several thousand people rallied outside Bulgaria's central bank and the European Commission building in Sofia to protest government plans to introduce the euro as official currency.Clashes broke out between police and nationalist protesters in Bulgaria's capital,