epa04066698 A Ukrainian protester plays piano on a barricade in front of the riot police line during the continuing protest in Kiev, Ukraine, 10 February 2014. Opposition groups have for weeks been staging protests in the capital Kiev and other parts of the country, demanding the president’s resignation and early elections. Ukrainian opposition leader Vitali Klitschko has urged the European Union (EU) to meditate in the country’s deep political crisis. EPA/SERGEY DOLZHENKO