<span style="color: #222222;">Russian Prime Minister Dmitry Medvedev has resigned. The Tass news agency said that Medvedev submitted his resignation to President Vladimir Putin today. </span><br />'' <br />'' <span style="color: #222222;">It said, President Putin thanked Mr. Medvedev for his contribution. The agency also reports that Mr. Putin will name Mr. Medvedev as deputy of the presidential Security Council. </span><br />'' <br />'' <span style="color: #222222;">Russian President asked Medvedev's Cabinet to keep working until the new Cabinet is formed.</span><br />''