Nemtsov planned to reveal Russian links to Ukraine conflict - Poroshenko

Russian President Vladimir Putin attends a wreath-laying ceremony to mark the Defender of the Fatherland Day at the Tomb of the Unknown Soldier by the Kremlin walls in central Moscow February 23, 2015. REUTERS/Sergei Karpukhin

(This refiled version of the story corrects spelling error in second paragraph)

KIEV (Reuters) - Ukrainian President Petro Poroshenko said on Saturday Russian opposition politician Boris Nemtsov was murdered because he planned to disclose evidence of Russia's involvement in Ukraine's separatist conflict.