Moscow (AFP) - At least 10,000 people turned out Sunday in central Moscow to march in memory of slain opposition leader Boris Nemtsov, who was gunned down in a high-profile assassination, AFP reporters said at the scene.

Access to the underground rail network was almost impossible due to the crowd, but Moscow police, often accused by critics of downplaying turnout at opposition rallies, estimated the numbers at 7,000.

Another 2,500-3,000 people, some wrapped in Ukrainian flags, marched in the second city of Saint Petersburg, an AFP journalist said.