Photographs posted on the group's blog page show its members dressed in brightly colored dresses and stockings standing on the outside wall of Lobnoye Mesto, a centuries-old platform across from the Kremlin on which tsars' decrees were once read.

The group said they performed a song that began with the lyric "A column that has risen up in rebellion is moving toward the Kremlin". Another lyric in the song echoed a chant from last month's demonstrations protesting the State Duma elections: "We exist".

The group wrote on its Twitter account Friday evening that half the group's singers were in police custody.