
Nemtsov was detained on Friday on the Triumphal Square after he spoke at the permitted rally in defense of the 31st article of the Constitution. In his speech, he urged the government to resign.
Earlier, the court sentenced to 10 days the arrest of the activist of the "Left Front" Konstantin Kosyakin. He was also detained on December 31 on Triumphal Square, when he tried to go to the second rally in defense of freedom of assembly - unauthorized by the authorities.