On August 25, Moscow police detained on Red Square a Russian activist Anna Krasovitskaya who stood there with a poster in support of a Kremlin's political prisoner, Ukrainian filmmaker Oleh Sentsov. Krasovitskaya is the granddaughter of Natalia Gorbanevskaya, one of the participants in the "Demonstration of the Seven" in August 1968, UNIAN reports. Back in 1968, a group of human rights activists took to Red Square, protesting against the invasion of Czechoslovakia by Soviet troops and the suppression of the "Prague Spring."