Several hundred Russian protesters have held an antiwar demonstration in St. Petersburg.
On the same day on September 27, several dozen people also joined a similar march in Moscow to call for an end to Russia's intervention in Ukraine and stay out of the conflict in Syria.
Police detained 10 of the protesters in Moscow and two in St. Petersburg.
In St. Petersburg, some protesters sang the Ukrainian national anthem and others held blue and yellow balloons, the colors of the Ukrainian flag.
Those detained in St. Petersburg were a woman who tried to unfold an antiwar poster and a man draped in a Ukrainian flag.
Police said only balloons and ribbons were permitted during the demonstration.