Censor.NET reports about it, citing the BBC News and the Wall Street Journal.
"Today is a reminder that the United States means what it says," Mr. Obama said in a statement at the White House. "The sanctions we're announcing today will have an even bigger bite," because they are matched by sanctions from the Europeans.
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The United States cut off three more Russian banks, including the giant VTB Bank, from medium- and long-term capital markets and barred Americans from doing business with the United Shipbuilding Corporation, a large state-owned firm created by Mr. Putin. The Obama administration also formally suspended export credit and development finance to Russia.
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Mr. Obama said the U.S. has evidence that Russia is arming separatists in eastern Ukraine and has launched artillery attacks over the border. Asked whether the U.S. is considering military assistance to Ukraine, Mr. Obama said Ukraine's military is better armed than the separatists.
"The issue is how to prevent bloodshed in eastern Ukraine…and the main tool we have to influence Russian behavior is influence over its economy," he said.