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The White House says the United States will seek further sanctions against Iran in response to an alleged plot to assassinate Saudi Arabia's ambassador to Washington.
"We're responding very concretely with actions we know will have an impact on Iran and will make clear this kind of behavior is unacceptable and will further isolate Iran," White House spokesman Jay Carney told reporters.
But he stopped of citing any specific measures under consideration, except to say that Washington was discussing the issue with "friends and allies around the world."