Washington accuses Iran of directly aiding Yemen's Houthi rebels in attacks on commercial ships in the Red Sea.
The United States on Friday accused Iran of close involvement in attacks on commercial ships by Yemen's Houthi rebels, alleging Tehran's clerical state has provided drones, missiles and tactical intelligence.
The allegations, released by the White House based on US intelligence, mark the strongest remarks yet by the United States on Iran's purported role in the attacks.
"We know that Iran was deeply involved in planning the operations against commercial vessels in the Red Sea," National Security Council spokeswoman Adrienne Watson said.
"This is consistent with Iran's long-term material support and encouragement of the Houthis' destabilizing actions in the region," she said.
"We have no reason to believe that Iran is trying to dissuade the Houthis from this reckless behavior," she said.
Yemen's Houthi rebels have repeatedly targeted Israel-linked vessels in the vital shipping lane with strikes in support of Palestinians in Gaza amid Israel's relentless and indiscriminate onslaught, which killed over 19,000 people, mostly women and children.
The United States and its allies have worked to intercept the attacks and the Pentagon recently announced a coalition of more than 20 countries to protect Red Sea shipping.
