ROUGH CUT (NO REPORTER NARRATION)<br/> <br />Ukrainian protesters attacked the headquarters of President Yanukovich's party on Tuesday, throwing a molotov cocktail and hurling stones inside the building.<br/> <br />In the worst violence to rock the capital Kiev in more than three weeks, several thousand anti-government protesters clashed with police as they tried to approach Ukraine's parliament.<br/> <br />A smaller group headed to the headquarters of Yanukovich 'Party of the Regions'. They set fires around the building and threw a molotov cocktail inside. The occupants of the building replied by dousing water on the protesters. The protesters also attacked two cars as they left the compound.<br/> <br />Yanukovich has been battling the opposition-led street protests since he walked away from a trade pact with the European Union in November and opted instead for forging closer economic ties with Russia, Ukraine's Soviet-era master.<br/> <br />The protests have since broadened into a revolt against perceived sl
