Ukrainian Prime Minister Arseniy Yatsenyuk listens to a reporter's question after addressing a United Nations Security Council meeting on Ukraine on March 13 in New York City. Residents of Crimea are set to go to the polls March 16 on a referendum to break away from the Ukraine and join the Russian Federation. The United States and Europe have condemned the scheduled vote as illegal. John Moore/Getty Images/AFP
During an emergency Cabinet of Ministers meeting on March 16, Prime Minister Arseniy Yatsenyuk said that Ukraine's eastern border has been almost completely shut down with Russia. Many Russians have been refused entry to Ukraine if they are suspected by border guards of being sent to Ukraine to stir up demonstrations or cause violent unrest. Deadly demonstrations have taken place in the last week in Kharkiv and Donetsk, killing at least three people.