Obama ‘Deeply Concerned’ Russia May Have Invaded Ukraine

Obama: 'Deeply concerned' by reports of Russian military movement in Ukraine (Fox News)

President Obama said Friday that the U.S. government is "deeply concerned" by reports of Russian "military movements" inside Ukraine, warning that any violation of Ukraine's sovereignty would be "deeply destabilizing." 

"There will be costs for any military intervention in Ukraine," he said, without specifying what those costs might be.