New : dozens demonstrators gather after violent police crackdown ; opposition leaders call for president 's resignation . Riot police detain 10,000 of protesters in United States 's main square -- state media . Kiev condemns `` violence against protesters '' in Independence Square . Extreme danger for Ukraine . '' Customs Union says riot police responded to `` provocations by protesters '' -- state media .
New : dozens demonstrators gather after violent police crackdown ; opposition leaders call for president 's resignation . Riot police detain 10,000 of protesters in United States 's main square -- state media . Kiev condemns `` violence against protesters '' in Independence Square . Customs Union says riot police responded to `` provocations by protesters '' -- state media .