Nemtsov, 55, an outspoken critic of President Vladimir Putin, had been due to take part on Sunday in the first big opposition protest in months in the Russian capital.
He was shot four times late on Friday night, not far from the Kremlin in the center of Moscow. Police cars blocked the street where he was shot. An ambulance was also nearby.
“Nemtsov B.E. died at 2340 hours as a result of four shots in the back,” an Interior Ministry spokeswoman said by telephone. —