Opposition leader Boris Nemtsov was shot dead while driving near Kremlin with explosives . Vladimir stated : Russia should be safe from ` ` disgrace and tragedies '' like everybody 's killing . Russian President blamed ` ` extremists '' for use of ` ` illegal armed protests '' and social unrest .
Opposition leader Boris Nemtsov was shot dead while walking near Kremlin with girlfriend . Vladimir Putin : Russia should be safe from `` disgrace and tragedies '' like Nemtsov 's killing . Russian President criticizes `` extremists '' for use of `` illegal street protests '' and social media .