Switzerland announced Friday that planned talks on implementing a U.S.-Iran memorandum of understanding to end the Middle East war had been postponed, hours after U.S. Vice President JD Vance's departure for the Alpine country was cancelled.

"The planned talks between the U.S., Iran, Qatar and Pakistan have been postponed," the Swiss foreign ministry said in a message to AFP.

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.

Israeli Prime Minister Benjamin Netanyahu announced Thursday that Israel's "struggle" is not over yet, and that more challenges lie ahead, after the U.S. and Iran signed an MoU to end the war between them, which also inlcudes a clause about stopping the conflict in Lebanon and respecting its sovereignty and territorial integrity.

Qatar, a key negotiator in the deal to end the war between the U.S. and Iran, said on Thursday the agreement served as a firm basis for further talks.

The Gulf state's foreign ministry said in a statement that the deal "represents a solid foundation for advancing to the next stage of negotiations between the American and Iranian parties", ahead of technical talks expected in Switzerland on Friday.

Over the past two and a half years, Israel has taken control of swaths of Gaza, Lebanon and Syria that amount to its biggest expansion of militarily occupied lands in decades.

It is an area larger than many major cities — roughly 1,000 square kilometers (386 square miles) — and Israel has said it plans to stay indefinitely.

Israel's foreign minister said Thursday that he was severing all contact with the European Union's top diplomat Kaja Kallas over reported remarks in which she allegedly compared Israel to the apartheid regime that once ruled South Africa.

"Recently, it was published that during her visit to Mexico, she compared Israel to the racist apartheid regime that existed in South Africa," Gideon Saar wrote on X.

The Swiss foreign ministry confirmed Thursday that "initial negotiations" on implementing a U.S.-Iran memorandum of understanding on ending the Middle East war were planned to take place in Switzerland on Friday.

"Currently, the plan remains for the United States and Iran, along with the mediators Pakistan and Qatar and other involved countries, to meet tomorrow at the Burgenstock for initial negotiations on the implementation of the agreement," the ministry said, lifting a degree of uncertainty that had hung over the meeting at the luxury mountainside resort near Lucerne.

Israeli operations in the Gaza Strip have killed 1,005 Palestinians since a ceasefire was reached between Israel and the militant group Hamas last October, the Gaza Health Ministry said Wednesday.

The enclave has seen near-daily strikes, as well as shelling and gunfire along the boundary that divides Gaza into Israeli and Palestinian-controlled zones. The most recent deaths were recorded after a series of Israeli drone strikes in the past few days on towns and refugee camps in central Gaza and Gaza City.

JD Vance was supposed to be spending the week promoting his new book, the kind of event a potential presidential candidate like the vice president typically uses to speak to a wide audience about his life and values ahead of a campaign.

Instead, the rollout of Vance's second book, "Communion: Finding My Way Back to Faith," has been largely crowded out by something else he's put his name on: the tentative deal to end the Iran war.