Thousands of Russians are marching in Moscow to mark the two year anniversary of the death of opposition leader Boris Nemtsov, who was gunned down outside the Kremlin.

Marchers carried Russian flags and signs with quotes from Nemstov, including "Russia will be free."

Nemstov was a fierce critic of Russian President Vladimir Putin and members of the opposition blame the government for the killing..

The Kremlin has denied involvement in Nemtsov's murder.

Five suspects, all of them Chechens, went on trial over the killing in October.

President Putin labeled the killing "a provocation" and vowed the government would do everything to ensure those responsible are "properly punished."

Some information from AP was used in this report.