The White House stated in a release that "U.S. National Security Advisor Jake Sullivan spoke with Saudi Crown Prince Mohammed bin Salman on Tuesday, discussing several topics including Iran and steps aimed at ending the war in Yemen." The statement noted that "Sullivan reaffirmed President Joe Biden's unwavering commitment to ensuring that Iran does not acquire a nuclear weapon." The call comes after China recently mediated an agreement to restore relations between Saudi Arabia and Iran in a process in which the United States did not participate. The foreign ministers of Iran and Saudi Arabia met in Beijing last week after the two countries agreed to end their diplomatic estrangement after years of hostility that fueled conflicts across the Middle East.