"Peaceful demonstrations didn't give any results and many were disappointed, but we on the barricades forced Yanukovych to become frightened," said a 22-year-old masked radical who gave his name only as Igor.
"Yanukovych only understands the language of force. Only radical actions will force him to go," said Denis Nakhmanovich, a Spilna Sprava member.
Associated Press writers David Rising in Munich, Germany, and Jim Heintz in Kiev, Ukraine, contributed to this report.
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