Police officers detain one of the protest movement leaders, left radical Sergei Udaltsov, at Moscow's Pushkinskaya Square, on March 5, 2012, as the protesters refuse to leave the venue at the end of their larger rally earlier. Russian police broke up today a protest in central Moscow against Vladimir Putin's victory in presidential elections, roughly arresting dozens of people, an AFP correspondent said. AFP PHOTO / KIRILL KUDRYAVTSEV

Police officers detain one of the protesters at Moscow's Pushkinskaya Square, on March 5, 2012, as the protesters refuse to leave the venue at the end of their larger rally earlier. The sign (back) reads: "Russia." Russian police broke up today a protest in central Moscow against Vladimir Putin's victory in presidential elections, roughly arresting dozens of people, an AFP correspondent said. AFP PHOTO / ALEXANDER NEMENOV

Police officers detain one of the protesters at Moscow's Pushkinskaya Square, on March 5, 2012, as the protesters refuse to leave the venue at the end of their larger rally earlier. The sign (back) reads: "Russia." Russian police broke up today a protest in central Moscow against Vladimir Putin's victory in presidential elections, roughly arresting dozens of people, an AFP correspondent said. AFP PHOTO / KIRILL KUDRYAVTSEV

Communist party activists shout anti-Putin slogans during a rally demanding fair elections at the Pushkin Square in central Moscow on March 5, 2012. The opposition protest drew about 20,000 where leaders of the opposition movement slammed Putin's victory in the eve's presidential election with around 64 percent of the vote. Russian election monitors sorted today through thousands of complaints of alleged fraud in presidential polls, as they complained of pressure and even beatings during their work. AFP PHOTO / SERGEI SUPINSKY

Russian police gather near the site of a protest in downtown Moscow, Monday, March 5, 2012. A large rally held Monday to protest against Russian Prime Minister Vladimir Putin's victory in Russia's presidential election was sanctioned by authorities but security was tight, with some 12,000 police deployed to ensure order. (AP Photo/Alexander Zemlianichenko)

Russian police officers detain an opposition activist during a protest against alleged vote rigging in St. Petersburg, Russia, Monday, March 5, 2012. More then 100 protesters were arrested in St. Petersburg, where some 2,000 gathered for an unauthorized rally to protest Russian Prime Minister Vladimir Putin's victory in the presidential election. (AP Photo/Dmitry Lovetsky)

Police officers detain opposition activists during a protest against vote rigging in St. Petersburg, Russia, Monday, March 5, 2012. More then 100 protesters were arrested in St. Petersburg, where about 2,000 gathered for an unauthorized rally to protest Prime Minister Vladimir Putin's victory in Russian presidential election. (AP Photo/Dmitry Lovetsky)

Russian police officers detain an opposition protester during a protest near the Central Election Committee in Moscow, Monday, March, 5, 2012. Demonstrators are contesting the outcome of Russia's presidential election, pointing to a campaign heavily slanted in Putin's favor and to reports of widespread violations in Sunday's ballot. (AP Photo/Sergey Ponomarev)

Russian police officers detain opposition leader Edouard Limonov during a protest near the Central Election Committee in Moscow, Monday, March, 5, 2012. Demonstrators are contesting the outcome of Russia's presidential election, pointing to a campaign heavily slanted in Putin's favor and to reports of widespread violations in Sunday's ballot. (AP Photo/Sergey Ponomarev)

Russian police officers detain a protester after a rally in Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. The police action followed a rally in Moscow that drew about 20,000 protesters angry over a campaign slanted in Putin's favor and reports of widespread violations in Sunday's ballot. (AP Photo/Mikhail Metzel)

Russian police officers detain a protester after a rally in Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. The police action followed a rally in downtown Moscow that drew about 20,000 protesters angry over a campaign slanted in Putin's favor and reports of widespread violations in Sunday's ballot. (AP Photo/Mikhail Metzel)

Police detain protest leader Alexei Navalny, seen wearing hooded jacket, after a rally in Pushkin Square in Moscow, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. (AP Photo/Maria Turchenkova)

Russian police officers detain a protester after a rally in Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. The police action followed a rally in Moscow that drew about 20,000 protesters angry over a campaign slanted in Putin's favor and reports of widespread violations in Sunday's ballot. (AP Photo/Misha Japaridze)

Police officers detains an opposition demonstrator during an unsanctioned protest near Central Election Commission office, in downtown Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. (AP Photo/Ivan Sekretarev)

Communist party supporters hold a rally against results of presidential election in Moscow, Russia, Monday, March 5, 2012. (AP Photo/Mikhail Metzel)

Opposition demonstrators chant as they march blocking traffic at the busy Tverskaya street after a rally in Pushkin Square in Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. (AP Photo/Ivan Sekretarev)

Russian opposition protesters shout anti-Putin slogans during a rally in Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. The police action followed a rally in downtown Moscow that drew about 20,000 protesters angry over a campaign slanted in Putin's favor and reports of widespread violations in Sunday's ballot. (AP Photo/Mikhail Metzel)

Russian opposition protesters gather at a rally in Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. The police action followed a rally in downtown Moscow that drew about 20,000 protesters angry over a campaign slanted in Putin's favor and reports of widespread violations in Sunday's ballot. (AP Photo/Mikhail Metzel)

Opposition protesters gather a rally in Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. The police action followed a rally in downtown Moscow that drew about 20,000 protesters angry over a campaign slanted in Putin's favor and reports of widespread violations in Sunday's ballot. (AP Photo/Misha Japaridze)

Opposition protesters gather a rally in Moscow, Russia, Monday, March 5, 2012. Riot police on Monday broke up an opposition protest contesting Prime Minister Vladimir Putin's victory in Russia's presidential election, arresting dozens of participants, including prominent opposition leaders. The police action followed a rally in Moscow that drew about 20,000 protesters angry over a campaign slanted in Putin's favor and reports of widespread violations in Sunday's ballot. (AP Photo/Misha Japaridze)