Russian President Vladimir Putin signs into law the treaty to annex Ukraine's Crimea peninsula.<br /> <br />The signing came shortly after the annexation was unanimously approved by the upper house of parliament.<br /> <br />An international outcry, targeted sanctions and the threat of more from the European Union and the U.S. have so far failed to shake Moscow's plans.<br /> <br />In Crimea itself the situation is tense a day after Russian forces seized three Ukrainian naval vessels in Sevastopol harbour.<br /> <br />The flagship Slavutich was seen anchored there on Friday with the Ukrainian flag flying but it was blockaded by ships of the Russian Black Sea fleet.<br /> <br />At the Perevalnoye military base in Crimea, one of two seized under the control of Russian forces, there were signs Ukrainian soldiers were preparing to leave.<br /> <br />Many who live and work at the base felt the interim government in Kiev had given up on them and offered no real alternative.<br /> <br />Some were joining queues to add their names to
