BBC:

A leading Russian opposition politician, former Deputy Prime Minister Boris Nemtsov, has been shot dead in Moscow, Russian officials say.
An unidentified attacker shot Mr Nemtsov four times in central Moscow, a source in the law enforcement bodies told Russia’s Interfax news agency. He was reportedly shot near the Kremlin while walking with a woman. He died just before a march in Moscow against the war in Ukraine which he was actively promoting.
In a recent interview, he had said he feared Russian President Vladimir Putin would have him killed because of his opposition to the war in Ukraine.
Mr Putin has condemned the killing, a Kremlin spokesman told news agencies.

Of course he has.