A massive crowd of protesters , estimated to number at least 100,000 , gathered Sunday in Independence Square . Kiev 's police chief resigns after riot police violence against protesters , police say . Ukraine : Police Chief Resigns Interior minister apologizes for violence , but urges protesters to behave .
Kiev 's police chief resigns after riot police violence against protesters , police say . Ukraine : Police Chief Resigns Interior minister apologizes for violence , but urges protesters to behave .