Speaking by telephone Monday, top military officials from NATO and the Russian government discussed the situation in Ukraine, with both sides expressing their concerns. NATO says it respects Ukraine's sovereignty – and it hopes it's not alone.
Ukraine's former president, Viktor Yanukovych, has disappeared, after authorities announced an arrest warrant against him on charges of mass murder. His ouster led Russian Prime Minister Dmitry Medvedev to say today that Yanukovych had faced an "armed mutiny," the BBC says.
Russian leaders are also warning of possible risks to ethnic Russians in Crimea in eastern Ukraine, where Yanukovych is believed to have fled. The area has been the scene for pro-Russia demonstrations. As NPR's Peter Kenyon reports for All Things Considered, Crimea and the city of Sevastopol are now seen as a potential flashpoint for further violence.