President Trump's special envoy Steve Witkoff told Fox News that Iranian negotiators said Iran had the "inalienable right to enrich all their nuclear fuel."
China is the largest importer of energy in the world, and the disruption to oil imports caused by the conflict could be a potential Achilles' heel for Beijing.
The State Department urged Americans to "depart now" from countries including Bahrain, Egypt, Israel, Lebanon, Oman, Qatar, Saudi Arabia and the United Arab Emirates.
The first American service members to die in the U.S.-Israeli war with Iran were killed in an apparent Iranian drone attack on a makeshift office space in Kuwait, sources told CBS News.