Anti-government protesters in Bulgaria clashed late Monday with police after they threw stones at security forces and against the Parliament building in downtown Sofia.
In Sofia, eleven people were detained, police said. Several people, including police officers, have been injured.
Protesters blocked several boulevards in Sofia, causing traffic chaos.
Thousands of protesting Bulgarians in Sofia, Plovdiv, Varna and elsewhere urged Prime Minister Boyko Borisov to step down after Finance Minister Simeon Dyankov submitted his resignation earlier
Monday.
Demonstrators in Sofia and across the country also protested against high electricity prices. They accused the centre-right government of failing to raise living standards in the poorest EU
member state.
Sunday, Bulgaria saw the largest nationwide protests since January 1997, when hundreds of thousands of people rallied against the then ruling Socialists, whom they blamed for a severe economic and financial crisis.