The gathering is just one of several impromptu protests which have taken place in Moscow since President Vladimir Putin’s inauguration Monday, which was marked by unprecedented security measures. Police detained hundreds of people who tried to get near Putin’s cortege.

Activists have also staged flash mobs across Moscow, suddenly assembling in public places where they camp and remain for the night. Many of them have been detained for taking part in an unsanctioned gathering.

The writers led what they termed a “stroll” Sunday, defending people’s rights to gather on the streets without authorities’ permission. None of the marchers chanted slogans, or carried posters as has been the case in previous events.

Around 400 people were arrested at an unsanctioned rally last Sunday.