Police in the Russian capital have detained several protesters, including an opposition leader.
Dozens of protesters gathered in Moscow on December 31 to call attention to Article 31 of the Russian Constitution, which guarantees the right of free assembly.
Chanting "Free assembly all the time and everywhere," "Russia will be free," and "Freedom to political prisoners," protesters were led away -- sometimes dragged and carried -- by police officers and placed in waiting buses.
Eduard Limonov, a leader of the Other Russia opposition movement, was detained shortly after he arrived at Moscow's Triumph Square.
For several years, the Strategy 31 movement has called protests on the last day of every month with 31 days to draw attention to what opponents of President Vladimir Putin say is the Kremlin's suppression of criticism.
Based on reporting by Reuters and AFP