Police detained 90 people Sunday at an unsanctioned political opposition rally organized by former chess champion 
Eduard Limonov, a founder of an opposition coalition called The Other Russia, was also among the organizers, the Russian news agency Interfax reported.
"They were only separate attempts of hooligan and illegal actions, which were timely cut by police officers," the agency said, quoting Moscow police public affairs officer Viktor Biryukov.
The detainees were taken into custody as they approached Triumfalnaya Square in central Moscow.
The Other Russia's Web site said Kasparov and about 200 other opposition members met Friday and Saturday outside Moscow, "finalizing a new movement, which aims to peacefully dismantle what they describe as the illegitimate regime ruling Russia."
Kasparov, who is chairman of the United Civil Front party, "said it was impossible to reform" the regime of President Dmitry Medvedev and Prime Minister Vladimir Putin. CNN.com