Iran-US war live: Trump threatens tolls on Hormuz after Tehran declares it shut

Donald Trump's administration turned to Elon Musk's Grok chatbot to launch thousands of missiles in Iran, according to a top defense official.

In court filings this week, the Pentagon's artificial intelligence chief said the chatbot's continued operation is “a matter of paramount national security†— and was used to fire more than “2,000 munitions at 2,000 distinct targets within 96 hours.â€

Grok, a generative artificial intelligence chatbot developed by xAI, is among four AI models “currently capable of supporting national security applications,†according to Cameron Stanley, the Pentagon's chief digital and artificial intelligence officer.

An Iranian negotiating team has arrived in Zurich, according to state media IRIB.

The delegation is led by Iranian parliament speaher Mohammad Bagher Ghalibaf, along with foreign minister Abbas Araghchi, national security council deputy scretary Ali Bagheri, and foreign ministry spokesperson Esmail Baghaei.

Vice President JD Vance is on his way, and talks are expected to begin Sunday.

Iran's Islamic Revolutionary Guard Corps declared the Strait of Hormuz closed again on Saturday after accusing the US and Israel of violating the newly-signed peace deal.

The top joint military command, ​Khatam al-Anbiya Central ‌Headquarters, said that the closure was the “first step” in response to what it described as breaches of commitments to the Memorandum of Understanding signed by Donald Trump on Wednesday.

US officials have denied that Iran controls the Strait of Hormuz, which Iranian military insists the passage will be closed in response to Israeli strikes in Lebanon.

US Central Command said 55 merchant ships passed through the waterway on Saturday.

“Safe passage through the international waterway remained intact today as 55 merchant ships transited, moving large amounts of cargo and more than 17 million barrels of oil to global markets,†according to a statement.

Italian Prime Minister Giorgia Meloni delivered a sharp rebuke to President Donald Trump and attacked his popularity on Saturday, intensifying an ongoing feud that erupted during the G7 Summit.

US Vice President JD Vance is on his way to Switzerland where he expects to spend “a day or two.â€

“I think we're going to hopefully make progress on the nuclear issue, make progress on the Lebanon ceasefire issue,†he told reporters before boarding a small jet bound for Switzerland

“Those are the two big things that I think we're to be focused on. I'm sure the Iranians are going to have issues they'd like to discuss as well,†he added.

He claimed “things are actually getting better†and “slowing down†when it comes to Israeli airstrikes in Lebanon. “The big problem is that you have somebody will shoot and then somebody will respond, and you kind of have a chicken and egg problem where you've just got to stop the shooting for long enough to get the ceasefire to keep hold, that's what we're going to try to do,†he said.

Iran's negotiating delegation has arrived in Switzerland for talks with the US, the country's media has reported.

US vice president JD Vance has said that he may be able to get to the European country for a day or two as the countries iron out the details of the peace deal. US negotiators Jared Kushner and Steve Witkoff are already there.

The US and Iran had agreed to a 60-day ceasefire while negotiations take place.

Tehran’s Islamic Revolutionary Guard Corps on Saturday declared the Strait of Hormuz shut, appearing to raise the stakes ahead of the talks as both sides seek to advance an interim deal brokered by Pakistan and signed on Wednesday by US.

US president Donald Trump has taken to social media platform Truth Social to insist that there will be no tolls on the Strait of Hormuz unless they are imposed by America, after Iran claimed they would close the crucial waterway to tankers.

In a post on Truth Social on Saturday evening, Mr Trump said: “There will be NO TOLLS in the Hormuz Strait for 60 days during the cease fire period, and there will be NO TOLLS after the 60 day period has expired, unless they are imposed by and for the United States of America, should the deal not be completed, for services rendered as the Guardian Angel to the countries of the Middle East for the purposes of both past, present, and future reimbursement of costs.

“Thank you for your attention to this matter!!! President DJTâ€.

Israeli strikes on Lebanon killed at least 20 people on Saturday, according to Lebanon's state news agency.

Israel said the strikes were a response to projectiles fired overnight by Hezbollah. An Israeli military official said Hezbollah launched more than 50 projectiles at Israeli forces in southern Lebanon, prompting attacks on what the official described as “Hezbollah targets”. Lebanon’s National News Agency reported that Israeli warplanes and drones had struck multiple locations in southern Lebanon and the Bekaa Valley.

Meanwhile, Hezbollah accused Israel of committing hundreds of ceasefire violations, and warned that continued attacks “will not pass without a response”.