Navalny called on his supporters to protest after being arrested last weekend when he returned to Moscow for the first time since being poisoned in August with a military-grade nerve agent. Navalny had been treated in Germany. Video footage from Vladivostok showed riot police chasing a group of protesters down the street, while demonstrators in Khabarovsk, braving temperatures of around -14 Celsius (7 degrees Fahrenheit), chanted "Shame!" and "Bandits!" Police in the Siberian city of Yakutsk, one of the coldest cities in the world and where the temperature was -52 Celsius on Saturday, grabbed a protester by his arms and legs and dragged him into a van, video footage from the scene showed. The OVD-Info monitoring group said that 238 people, including 56 in Novosibirsk, had been detained so far at the rallies.