Russian police today detained around 200 activists gathering in central Moscow for an unauthorised protest against President Vladimir Putin. State news agency and a monitoring group reported that Radical opposition activist Vyacheslav Maltsev had<br/>appealed on his website for his supporters to hold protests across Russia today, calling for a people's Revolution and for an immediate end to Putin's rule.<br/><br/>OVD-Info, which monitors detentions at political protests, said that 212 people were held in Moscow, as well as 25 people in five other cities.<br/>The protest today came after police in Moscow yesterday detained dozens of people at a nationalist anti-Kremlin march on a public holiday known as the Day of National Unity.