Hundreds of people went to Borisovskoye cemetery in Moscow to visit the grave of Russian opposition leader Alexei Navalny who died in prison on February 16 and was buried on March 1.
The police tried to stop the crowd, but had to retreat.
The visitors chanted slogans: "Hello, I'm Navalny", "Putin is the killer", "Bring back out soldiers", "Ukrainians are good people".
Some of those who gathered at the entrance of the cemetery, were detained.