Several thousand supporters of Bulgaria's ultra-nationalist Revival party scuffled with police on Saturday while trying to storm the building of a European Union mission during a protest against the country's plans to adopt the euro next year.

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.

Our EU office has been vandalized,” said European Commission President Ursula von der Leyen, calling the attack “outrageous.”

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.