From the BBC:
An unidentified attacker in a car shot Mr. Nemtsov four times in the back as he crossed a bridge in view of the Kremlin, police say.His fears were well founded.
He died hours after appealing for support for a march on Sunday in Moscow against the war in Ukraine.
Russian President Vladimir Putin has condemned the murder, the Kremlin says.
In a recent interview, Mr Nemtsov had said he feared Mr Putin would have him killed because of his opposition to the war in Ukraine.
Russian military conducts drill on Estonian and Latvian borders
Bumper sticker photo: Putin Huilo (Putin is a dickhead)