US envoy Haley: Houthi missile fired at Riyadh 'made in Iran'
"It was made in Iran then sent to Houthi militants in Yemen," Haley said of the missile.
"From there it was fired at a civilian airport with the potential to kill hundreds of innocent civilians in Saudi Arabia."
Haleymade the comments during a news conference in Washington to highlight the findings as well as draw attention to Iran's "destabilising activities in the Middle East region and elsewhere in the world".
"The Iranian regime cannot be allowed to engage in its lawless behaviour any longer”, she added.
Iran responded immediately, saying US evidence on Yemen missiles is "fabricated", saying the accusations were baseless.
"This purported evidence, put on public display today, is as much fabricated as the one presented on some other occasions earlier," said Alireza Miryousefi, spokesman at Iran's mission to the United Nations.
UN Secretary-General Antonio Guterres earlier warned that Iran may be defying a United Nations call to halt ballistic missile development even as it complies with the nuclear deal with six world powers.
He then stressed that the nuclear deal remains "the best way" to ensure the exclusively peaceful nature of Iran's nuclear programme.
He said US President Donald Trump's October 13 decision not to certify the agreement under US law created "considerable uncertainty" about its future.
But, he added, "I am reassured that the United States has expressed its commitment to stay in the Joint Comprehensive Plan of Action for now."