MOSCOW -- One of Russia's most prominent human rights defenders, Sergei Sharov-Delone, has died at the age of 63.

Sharov-Delone's son, Aleksandr Sharov, and the chairwoman of the Russia Behind Bars rights organization, Olga Romanova, said that Sharov-Delone had died late in the night on November 7 after suffering from cancer.

Sharov-Delone was a member of the May 6 Committee that investigated police brutality against protesters during demonstrations in Moscow in May 2012 ahead of Vladimir Putin's inauguration for a third term as president.

He actively assisted imprisoned activists via the Russian Behind Bars group and coordinated operations of the Moscow-based Public Defenders' School.

Sharov-Delone was a cousin of Soviet-era dissident Vadim Delone -- one of seven Soviet dissidents who openly protested on Moscow's Red Square against the Soviet-led Warsaw Pact invasion of Czechoslovakia in August 1968.

In 2017, RFE/RL released a documentary about Sharov-Delone's life and activities entitled Defender.

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