Pussy Riot: Garry Kasparov arrested outside Moscow court
17 August 2012 Last updated at 15:40 BST
Ex-world chess champion Garry Kasparov was among several people arrested outside the court in Moscow, where three members of Pussy Riot punk band were found guilty of hooliganism.
As Mr Kasparov was dragged to a nearby police van he demanded to know why he was being arrested.
Nadezhda Tolokonnikova, Marina Alyokhina, and Yekaterina Samutsevich, stormed the altar of a cathedral in February and sang a "punk prayer" urging the Virgin Mary to rid Russia of President Vladimir Putin.