UNITED NATIONS (Reuters) - Iran violated a U.N. Security Council resolution in October by test firing a missile capable of delivering a nuclear warhead, a team of sanctions monitors said, leading to calls in the U.S. Congress on Tuesday for more sanctions on Tehran.

The White House warned that it would not rule out additional steps against Iran over the test of the medium-range Emad rocket.

The Security Council's Panel of Experts on Iran said in a confidential new report, first reported by Reuters, that the launch showed the rocket met its requirements for considering that a missile could deliver a nuclear weapon.

"On the basis of its analysis and findings the Panel concludes that Emad launch is a violation by Iran of paragraph 9 of Security Council resolution 1929," the panel said.

Diplomats say the rocket test on Oct. 10 was not technically a violation of the July nuclear deal between Iran and six world powers but the U.N. report could put President Barack Obama's administration in an awkward position.

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