Obama: New sanctions 'increase costs on Russia' for actions in Crimea

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President Barack Obama is freezing the U.S. assets of seven Russian officials, including top advisers to President Vladimir Putin, for their support of Crimea's vote to secede from Ukraine.

The Treasury Department also is imposing sanctions on four Ukrainians - including former President Viktor Yanukovych.

Senior administration officials also say they are working to identify what they called "Russian government cronies" to target the assets of those supporting the Crimea unrest, including individuals working in the arms industry.