World Russian officials investigating murder of opposition leader Nemtsov

Prominent Russian opposition figure Boris Nemtsov was gunned down Friday on a bridge near the Kremlin. His supporters have suggested he may have been killed for being one of President Vladimir Putin's most vocal critics.

Russia's top investigative body said Saturday it is looking into several possible motives for the killing of prominent opposition figure Boris Nemtsov, including an attempt to destabilize the state, Islamic extremism, the Ukraine conflict and his personal life.