Thousands march to honor slain Russian opposition leader

Demonstrators, with flags of different opposition movements and portraits of Boris Nemtsov, march in memory of opposition leader Boris Nemtsov in Mosc

Demonstrators, with flags of different opposition movements and portraits of Boris Nemtsov, march in memory of opposition leader Boris Nemtsov in Mosc

Demonstrators, with flags of different opposition movements and portraits of Boris Nemtsov, march in memory of opposition leader Boris Nemtsov in Mosc

Demonstrators, with flags of different opposition movements and portraits of Boris Nemtsov, march in memory of opposition leader Boris Nemtsov in Mosc

Demonstrators, with flags of different opposition movements and portraits of Boris Nemtsov, march in memory of opposition leader Boris Nemtsov in Mosc

Demonstrators, with flags of different opposition movements and portraits of Boris Nemtsov, march in memory of opposition leader Boris Nemtsov in Mosc

Former Russian Prime Minister, and one of opposition leaders, Mikhail Kasyanov, center, attends a march in memory of opposition leader Boris Nemtsov i

Former Russian Prime Minister, and one of opposition leaders, Mikhail Kasyanov, center, attends a march in memory of opposition leader Boris Nemtsov i

Demonstrators carry a banner with a portrait of Boris Nemtsov march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 2

Demonstrators carry a banner with a portrait of Boris Nemtsov march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 2

Former Russian Prime Minister, and one of opposition leaders, Mikhail Kasyanov, center, attends a march in memory of opposition leader Boris Nemtsov i

Former Russian Prime Minister, and one of opposition leaders, Mikhail Kasyanov, center, attends a march in memory of opposition leader Boris Nemtsov i

Russian opposition activist Alexei Navalny, center, and his wife Yulia, left, take part in a march in memory of opposition leader Boris Nemtsov in Mos

Russian opposition activist Alexei Navalny, center, and his wife Yulia, left, take part in a march in memory of opposition leader Boris Nemtsov in Mos

Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 2019

Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 2019

Demonstrators, with flags of different opposition movements, march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 20

Demonstrators, with flags of different opposition movements, march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 20

Demonstrators, with flags of different opposition movements, march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 20

Demonstrators, with flags of different opposition movements, march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 20

Demonstrators, with flags of different opposition movements, march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 20

Demonstrators, with flags of different opposition movements, march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 20

Russian opposition activist Alexei Navalny, center, takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb.

Russian opposition activist Alexei Navalny, center, takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb.

Demonstrators, with flags of different opposition movements and portraits of Boris Nemtsov, march in memory of opposition leader Boris Nemtsov in Mosc

Demonstrators, with flags of different opposition movements and portraits of Boris Nemtsov, march in memory of opposition leader Boris Nemtsov in Mosc

Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 2019

Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 2019

Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 2019

Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia, Sunday, Feb. 24, 2019

MOSCOW (AP) — Thousands of people have marched in central Moscow to commemorate Russian opposition figure Boris Nemtsov, who was killed four years ago.

Nemtsov was shot on Feb. 27, 2015 as he walked along a bridge near the Kremlin. The killing was a harsh blow to Russians opposed to President Vladimir Putin, depriving them of a charismatic and energetic leader.

Activist Nataliya Gryaznyevich said at Sunday's march that "Nemtsov was a very colorful political figure." She said his death "left an empty hole in politics."

An officer in the security forces of Chechnya's Kremlin-backed leader Ramzan Kadyrov was convicted of firing the shots that killed Nemtsov and received a 20-year prison term. Four other men convicted of being involved in Nemtsov's slaying received 11 to 19 years.