M inister organization.leadership Internal Affairs Vitaliy Zakharchenko later apologized and claimed `` riot police abused their power '' and promised a thorough investigation .

M inister organization.leadership Internal Affairs Vitaliy Zakharchenko stated in March 2012 that since 2010 about 400 politicians had faced criminal charges in connection with corruption ; most of them from the Party of Regions , followed by Bloc Yulia Tymoshenko and Our Ukraine–People 's Self-Defense Bloc members .