Riot police used smoke bombs and stun grenades - and also batons and fists - in clashes with demonstrators in Kyiv on the night of Sunday, December 1.
Around a thousand protesters blocked off the Ukrainian government's main headquarters in Kyiv on Monday.
The opposition has called for more protests and a national strike to force the resignation of President Yanukovych after he refused to sign a trade pact with the EU.
Tens of thousands of pro-EU demonstrators marched through Ukraine's capital to protest the president's refusal to sign an agreement with the European Union. The raging crowd, which split into several columns, also stormed the Mayor's offices on Sunday, breaking windows and opening the doors from the inside. The protesters set up what they described as the temporary headquarters of the united opposition. FOLLOW LIVE UPDATES: http://on.rt.com/dhvlo2