Iran said it was once again closing the vital Strait of Hormuz shipping lane on Saturday over Israel's attacks in Lebanon, calling them a violation of its deal with the United States to end the Middle East war.

The American push to quickly begin high-stakes talks with Iran hit a snag Friday, just days after the signing of an agreement that opens a two-month window for negotiations on Tehran's nuclear program and returning oil traffic through the Strait of Hormuz to prewar levels.

Iranian officials did not travel as planned to Switzerland, insisting that Israel strikes on Iranian-backed Hezbollah militants Lebanon must stop before the talks can take place, according to three regional officials and a person familiar with the matter. They were not authorized to publicly discuss the ongoing mediation to try to get the talks rescheduled and spoke on condition of anonymity.

European Union leaders have been unable to agree on setting up a back-channel with Moscow to ensure that the bloc's interests are protected should progress be made in negotiations to end Russia's war on Ukraine, some of them said on Friday.

European Council President António Costa, who chaired their two-day summit, had directed his office to reach out to the Kremlin and proposed a senior official to make contact. Costa said his aim was not to mediate or set up a parallel negotiating track to the one led by the United States, which is making little progress.

Italy's foreign minister on Friday said he was cancelling a visit to the United States over reported comments by U.S. President Donald Trump that appeared to mock Prime Minister Giorgia Meloni.

"The grave and offensive words of President Trump... offend the whole of Italy," Foreign Minister Antonio Tajani, who had been due to visit the U.S. on June 21 and 22, said on X.

U.S. Vice President JD Vance on Thursday issued an extraordinary rebuke to Israeli critics of the Iran deal, warning them not to alienate their "only powerful ally" left in the world.

Vance told members of Israeli Prime Minister Benjamin Netanyahu's cabinet to "wake up and smell the reality," amid growing tensions between Netanyahu and U.S. President Donald Trump.

Israel's Prime Minister Benjamin Netanyahu underscored the importance of maintaining close ties with the United States on Thursday, saying Washington had stood by its ally during the Middle East war.

"The struggle is not yet over, and further challenges lie ahead. They require calm judgement, steadfast defense of Israel's security interests, and at the same time the preservation of our vital relationship with our American friends, who stood shoulder to shoulder with us in this fight -- a partnership we deeply appreciate," Netanyahu said at a function, according to a statement issued by his office.

The European Union has reached out to Moscow in a tentative bid to open a line of communication so the continent is not sidelined in any potential talks to end Russia's grinding war in Ukraine, officials said Thursday.

The news emerged as Ukraine launched one of its biggest drone attacks since Russia's all-out invasion of its neighbor more than four years ago, Russian officials said Thursday. A major Moscow oil refinery was hit for a second time in a week and commercial flights at Moscow airports were disrupted.

President Vladimir Putin on Thursday hailed Russia's ties with the Association of Southeast Asian Nations as he hosted a summit intended to strengthen economic and political ties with the bloc.

The leaders who took part in the meeting in Kazan agreed to further expand "strategic partnership" between Russia and ASEAN nations that include Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand, East Timor and Vietnam.

U.S. Defense Secretary Pete Hegseth lashed out at NATO allies on Thursday, announcing a six-month Pentagon review of American forces in Europe whose outcome will depend on how fast the Europeans take responsibility for their own security.

"This will be a real review. It will be designed to ensure that NATO is moving fast and irreversibly toward Europe leading, stepping up to take primary responsibility for the defense of Europe," he told his NATO counterparts in Brussels.

President Donald Trump is not known to be a fan of international gatherings of world leaders, but he changed his tune at this year's G7 summit at a French Alpine resort, where he was buoyed by support from his counterparts for his tentative agreement with Iran to end the war.

It was an about-face for Trump, who weeks ago had sharply criticized his counterparts for refusing to join the United States and Israel in bombing Iran to force it to abandon its nuclear aspirations — and who last year spent only a day at the G7 summit before cutting out early and going back to Washington.