Thousands pay tribute to 'slain' opposition leader Boris Nemtsov in Moscow

Thousands of people in Moscow paid tribute to slain Russian opposition politician Boris Nemtsov by lighting candles and placing flowers at the site where he was shot dead, a report said.

An opposition march planned by Nemtsov in Moscow for Sunday turned into a memorial rally, reported the BBC.

While condemning Friday's killing as "vile and cynical," Russian President Vladimir Putin vowed to find the killers.

However, Nemtsov's allies termed his murder a "political killing" and linked it to opposition to Putin and the Ukraine conflict.