A man flashes the victory sign through the shattered window of a damaged apartment following a ceasefire between Israel and Hezbollah in the town of Nabatiyeh, southern Lebanon, Monday. (AP Photo/Mohammed Zaatari)

OBBUERGEN, Switzerland (AP) — Vice President JD Vance on Monday said his lengthy talks with senior Iranian officials in Switzerland created a “good foundation for a successful final deal” as they seek a permanent end to the war that the U.S. and Israel began in late February.

Vance and U.S. officials claimed progress on multiple fronts, including the establishment of “mechanisms” to ensure the Strait of Hormuz, a vital waterway for global energy shipments, stays open and to address fighting between Israel and Iranian-backed Hezbollah militants in southern Lebanon, where a ceasefire appeared to be holding.

The vice president departed Switzerland as technical teams were still negotiating, and U.S. President Donald Trump talked up the efforts to keep the strait open to create “an oil gusher” as he stressed that the key to resolving the war was “respect” from Iran.

“As long as they respect us, I don’t want to use the word fear because that’s an inappropriate word, but as long as they respect us, we’re not going to have any trouble,” Trump said from the Oval Office.

Iran effectively closed the strait after the U.S. and Israel attacked on Feb. 28, causing fuel prices to skyrocket far beyond the region. The interim agreement to end the war was supposed to reopen the channel. Dozens of ships passed through it over the weekend, even though the main route is still mined and closed.

Shortly after those attacks, Hezbollah and Israel also went to war, with Hezbollah firing rockets and drones at civilian communities in northern Israel and Israel seizing large swaths of southern Lebanon. Iran has insisted that addressing the fighting in Lebanon is a critical component of any deal to end the wider conflict.

Iran noted “major progress” to end the fighting in Lebanon and called that the first real test of the negotiations.

In other developments, the U.S. Treasury issued a 60-day license waiving sanctions on Iranian oil as part of the interim agreement. Notably, the license allows Iranian oil to be imported into the U.S., which has not imported significant amounts of Iranian oil since the 1990s.

Also on Monday, the State Department announced that Secretary of State Marco Rubio would travel this week to the United Arab Emirates, Kuwait and Bahrain to discuss the latest developments in Iran.

The mediation effort in Switzerland started Sunday and stretched into early Monday.

“We haven’t built the house, but we’ve laid a successful foundation to get to a good place for the American people,” Vance told reporters after initial talks with Iran’s parliamentary speaker, Mohammad Bagher Qalibaf.

Trump did not attend what was dubbed the “Lake Lucerne Summit,” but his presence certainly loomed large. The talks were jolted by statements from Trump, who, from thousands of miles away, fired off comments that offended the Iranians.

Iranian state media said talks had paused after the “publication of an insulting message by the U.S. President.” The negotiations later continued.

The vice president suggested that the U.S. could agree to unfreeze Iranian assets for purchases of U.S. soy, corn and wheat. He said Jared Kushner, Trump’s son-in-law and one of the lead U.S. negotiators, came up with the idea with officials from Qatar.

Vance said Qatar would have approval over the process, and Iranian money that would be accessible as sanctions were lifted would buy American products “for the benefit of the Iranian people.”

Iran, which has pressed for the unfreezing of billions of dollars in assets, has not commented on the idea. The assets have been frozen over years of sanctions, banking restrictions and legal disputes imposed by the U.S. and international community.

In a joint statement, mediators Pakistan and Qatar hailed what they called “encouraging progress.”

The interim deal to end the fighting in Iran, signed last week by the leaders of the U.S. and Iran, sets a 60-day period for negotiations on key issues, including the future of Tehran’s nuclear program amid concerns that Iran wants to use it for military purposes, a claim the country denies.

Vance said the technical talks, which were to continue this week, were critical. U.S. envoys Kushner and Steve Witkoff are handling many of the technical details.