kiev ukrainian lawmaker wound explosion kiev kill two people blame russia thursday blast investigators say consider various motives call act terrorism ihor mosiychuk member populist opposition radical party hospitalize suffer life-threatening injuries bodyguard passerby kill two others wound since fight pro-russian separatists eastern ukraine break 2014 number incidents involve explosives outside conflict zone increase spate vehicle bomb past 18 months kiev capital elsewhere investigators fail find responsible ukraine state security service sbu say unknown perpetrators rig motorcycle explosives wednesday detonate lawmaker leave tv station radical party leader oleg lyashko say doubt incident politically motivate mosiychuk blame russia believe initiators moscow executors kiev mosiychuk say facebook russian involvement one possible motives investigate deputy kiev prosecutor pavlo kononenko tell journalists another explanation mosiychuk political activity public position within country say third explanation attempt mosiychuk life personal reason kremlin dismiss accusations product anti-russian sentiment beyond doubt new sign anti-russian campaign unfortunately sweep across ukraine kiev russian president vladimir putin spokesman dmitry peskov say conference call reporters relations kiev moscow collapse 2014 russia seize ukraine crimea peninsula back pro-russian separatist insurgency eastern ukrainian regions radical party lawmaker evhen deidei post photos facebook page scene wednesday attack show burnt-out shell motorcycle front damage vehicle judge damage car shrapnel hole doors power explosion pretty strong say lot blood stairs ihor situate time explosion interior ministry shkiryak say political analyst vitaliy bala one three wound blast june colonel ukraine military intelligence kill car bomb central kiev 2016 prominent investigative journalist pavel sheremet kill explosive device car ukrainian lawmaker blame russia deadly kiev blast