Axios

The Iranian armed forces announced Saturday they will close the Strait of Hormuz — just three days after it reopened — alleging America's failure to rein in Israeli attacks on Lebanon violates the new ceasefire deal.

Why it matters: This is the first big crisis between the U.S. and Iran since signing a memorandum of understanding to end the war earlier this week.

Donald Trump and Giorgia Meloni's war of words over a factually contested photo op request at the G-7 exploded on Saturday, with the one-time friends blasting each other in angry terms on social media.

Why it matters: Even as Trump lavishes praise on American adversaries like China's Xi Jinping, close allies are increasingly willing to split with him.

White House envoys Steve Witkoff and Jared Kushner are in Switzerland, where the first round of talks with Iran on a potential nuclear deal is expected to take place on Sunday, U.S. officials told Axios.

• Iran's foreign minister Abbas Araghchi traveled to Switzerland on Saturday to join the talks. Vice President Vance is expected to travel to Switzerland on Saturday to participate in the negotiations Sunday, a per source familiar, while Iranian parliament speaker Mohammad Ghalibaf is also expected to attend.

Why it matters: The talks were supposed to start on Friday but were postponed because of the fighting between Israel and Hezbollah in Lebanon. It's not yet clear if a new time has been set for the talks.