Here's a picture of Russian activist Sergei Shavrov-Delaunay just after his release from police custody, where he had been taken after attending a protest in Moscow's Red Square on August 25.
He was one of three people detained in the Russian capital who were commemorating the 50th anniversary of the 1968 protest there against the Soviet-led invasion of Czechoslovakia. Another of the detainees stood with a placard supporting Ukrainian filmmaker Oleh Sentsov, who is currently on an extended hunger strike to protest his imprisonment in Russia.
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An interesting point:
Here's this person's preceding tweet for more context: