US Ambassador Nikki Haley today argued in a letter to the Security Council that the Simorgh space launch vehicle system, "if configured as a ballistic missile," would have a range and enough payload capacity to carry a nuclear warhead.
"This launch therefore represents a threatening and provocative step by Iran," said the letter from Haley on behalf of the four countries.
Iran launched the rocket on July 27, prompting the United States to impose sanctions on six companies that Washington said were linked to Iran's missile program.
Resolution 2231 was passed two years ago to endorse a landmark 2015 nuclear deal between Iran, Britain, China, France, Germany, Russia and the United States.
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Under that resolution which lifted sanctions in exchange for curbs on Iran's nuclear program, Tehran is "called upon" to refrain from carrying out launches of missiles capable of delivering nuclear weapons.
Iran has repeatedly said that it is not seeking to develop nuclear weapons and is not in violation of the resolution.
"Our friends and allies in the United Kingdom, France, and Germany join us in calling out and condemning Iran's destructive and threatening actions," Haley said about the joint letter.
"The world must not allow Iran to act in defiance of the Security Council and its resolutions. The United States will be vigilant in ensuring that Iran is held accountable for such behavior."
The four countries argued in the letter that the technology necessary for the space launch vehicle was "closely related to those of ballistic missiles, in particular to those of an intercontinental ballistic missile."
This information should "allow the council to draw informed and timely conclusion as to what action should be taken," said the letter.
Haley has repeatedly called on the council to respond to Iran's missile tests, but Russia has said Iran is not in violation of the resolution.
The four countries called on Iran to "immediately cease" all ballistic missile activities and said the international community must also "send a clear message to Iran."
Iran's foreign ministry on Saturday said it will continue "with full power" its missile program and accused the US administration of seeking to weaken the nuclear deal.
Despite its criticism, the US administration has certified that Iran was in compliance with the agreement.
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