Russian activist put on most-wanted list MOSCOW, Oct. 4 (UPI) -- Russian opposition leader Anastasia Rybachenko was put on a most-wanted list for her role in May demonstrations in Moscow, the government said. More than 600 people were arrested after demonstrators clashed with Moscow police during May 6 demonstrations. Rybachenko, an activist with the opposition Solidarity movement, was put on a most-wanted listed by the government for her part in the demonstrations, state-run news agency RIA Novosti reports. She left Russia during the summer and has since lived in Estonia where she's seeking entrance into a university there. Anti-government sentiment in Russia escalated in December when the United Russia part, once led by President Vladimir Putin, won State Duma elections. Putin's re-election to a third non-consecutive term early this spring sparked further demonstrations. In September, United Russia voted to expel opposition leader Gennady Gudkov from the lower house of the Russian Parliament. He told lawmakers the action against him was because lawmakers were "afraid of criticism." Moscow ordered the U.S. Agency for International Development to leave the country following concerns the group was meddling in political affairs. Svetlana Gannushkina, a former member of the Kremlin's human rights council, said the move was "part of an obvious general tendency to limit the activities of civil society."