|Obama announces new Iran sanctions|
Executive order used to unveil measures meant to force Islamic republic to meet its international nuclear obligations.
Obama's decision, in an executive order, came in advance of congressional votes on new sanctions intended to further strip Iran of its oil-related revenues.
But Obama said the US was still committed to finding a diplomatic resolution to the deadlock but would seek "to hold the Iranian government accountable for its actions".
"If the Iranian government continues its defiance, there should be no doubt that the United States and our partners will continue to impose increasing consequences," he said.
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