A man who returns to his village following the announcement of an initial ceasefire agreement between the United States and Iran, flashes victory sign as he stands on the rubble of his destroyed house in Nabatiyeh town, southern Lebanon, Tuesday.(AP Photo/Hussein Malla)

DUBAI, United Arab Emirates (AP) — Iran’s top diplomat said Tuesday that the tentative deal to end the war with the United States would require Israel to withdraw from Lebanon — a condition Israel has already rejected and that could sink the agreement, leading to the resumption of all-out war.

The deal, which is between the U.S. and Iran, has not been made public, and officials have sometimes offered contradictory interpretations of what is in it. While Israel is not party to the agreement, it is part of the war after joining the U.S. in launching strikes on Iran on Feb. 28. Israel has also fought the Iran-backed Hezbollah militant group in Lebanon and seized large swaths of that country.

Iranian Foreign Minister Abbas Araghchi said Israel’s continued occupation of southern Lebanon would violate the deal.

“Without the withdrawal of Israeli forces from the territories they occupied during this war, the war has not fully come to an end,” Araghchi said.

A U.S. official, who spoke on condition of anonymity to discuss outlines of the agreement, has said the deal does not call for an Israeli withdrawal. And Israeli Prime Minister Benjamin Netanyahu said Monday that Israel would remain in Lebanon “as long as necessary.”

The negotiations to end the war have been plagued by such disagreements before, leading to a prolonged but uneasy ceasefire that has failed to develop into a permanent end to hostilities and has left the Strait of Hormuz, a crucial waterway for the world’s energy supplies, effectively shut.

In other developments, Switzerland’s foreign ministry said the signing ceremony for the deal will take place Friday at the Bürgenstock resort near the city of Luzern. Ministry officials said Tuesday that the location was proposed by Pakistani and Qatari mediators, along with the U.S. and Iran.

Pakistan has said the deal called for an end to military operations, including in Lebanon, as Iran long insisted. But Araghchi’s call for an Israeli withdrawal adds a new wrinkle.

It puts Israel into a dilemma as it tries to degrade Hezbollah’s military capabilities without undermining an agreement championed by its most important ally, the United States. Israel invaded southern Lebanon after Hezbollah fired missiles across the border during the first week of the war. Since then, it has expanded its military footprint to levels unseen in decades and struck targets deep inside Beirut.

Though Hezbollah has been weakened, it retains the ability to strike Israel, leaving open questions about the effectiveness of Israel’s campaign.

As of Tuesday evening, Netanyahu had not seen the memorandum of understanding between the U.S. and Iran, said a person familiar with the situation, who spoke on condition of anonymity to discuss closed-door details. Another person, who also spoke on condition of anonymity to discuss private conversations between Israel and the U.S., said Israeli officials have not asked U.S. negotiators for the memorandum.

Netanyahu’s office did not immediately respond to a request for comment from The Associated Press. The White House declined to comment on whether Netanyahu or Israeli officials have reviewed the agreement.

The Israeli ambassador to the U.S., Yechiel Leiter, told NPR that while Israel does not know the details of the deal, the apparent inclusion of Lebanon is “unnecessary and unhelpful.”

The extent of Israel’s strikes have at times opened a public fracture between its leaders and U.S. President Donald Trump, who told reporters Tuesday that he was “not happy with the way Israel has handled themselves with Lebanon and with Hezbollah.”

“It just goes on forever,” he said of Israel’s strategy. Israeli strikes in Lebanon have killed nearly 4,000 people, including hundreds of civilians, and displaced more than 1 million. “Israel’s fighting Hezbollah too long, and too many people are being killed,” Trump said.