Iranian, Egyptian and U.N. leaders met in Cairo on Monday to discuss Iran's nuclear program after a report from the U.N. nuclear watchdog agency said that Iran is further increasing its stockpile of uranium enriched to near weapons-grade levels.

Rafael Mariano Grossi, the director-general of the Vienna-based International Atomic Energy Agency, said that the agency compiled the report, because Iranian's uranium enrichment was an ongoing concern for the IAEA's board of governors.

Iranian Foreign Minister Abbas Araghchi said on Monday that a nuclear deal would not be possible if the goal is to "deprive Iran of its peaceful nuclear activities".

"If the goal of the negotiations is to gain reassurance and confidence that Iran is not seeking nuclear weapons, then in my view, reaching an agreement is possible," he said in a joint press conference with Egyptian foreign minister Badr Abdelatty. "But if the goal is to deprive Iran of its peaceful activities, then certainly no agreement will be reached," he continued.

Ukrainian President Volodymyr Zelensky arrived Monday in Vilnius for a summit with the leaders of NATO's eastern and Nordic members, some of Kyiv's staunchest backers amid the Russian invasion.

Zelensky's spokesman said he would hold "bilateral meetings" on the sidelines of the summit in the Lithuanian capital, which will also be attended by NATO Secretary General Mark Rutte.

Delegations from Russia and Ukraine ended their latest peace talks Monday in Turkey after just over an hour, Ukrainian President Volodymyr Zelenskyy and Russian state media said.

Speaking in Vilnius, Lithuania, Zelenskyy said both sides "exchanged documents through the Turkish side, and we are preparing a new release of prisoners of the war."

Tehran called on Washington to provide a formal guarantee that it will lift sanctions imposed on Iran in ongoing talks on the Islamic republic's nuclear program.

"We want to guarantee that the sanctions are effectively lifted," foreign ministry spokesman Esmaeil Baqaei told a news conference Monday in Tehran. "So far, the American side has not wanted to clarify this issue."

Iran's Foreign Minister Abbas Araghchi said he had received "elements" of a U.S. proposal for a potential nuclear deal following five rounds of talks mediated by Oman.

Omani Foreign Minister Badr al-Busaidi "paid a short visit to Tehran today to present elements of a U.S. proposal which will be appropriately responded to in line with the principles, national interests and rights of the people of Iran," Araghchi said on X.

French President Emmanuel Macron warned the U.S. and a large audience of Indo-Pacific nations Friday night that they risk a dangerous double standard as they concentrate on a potential conflict with China if that shift comes at the cost of abandoning Ukraine.

Macron's remarks come as the U.S. is considering withdrawing troops from Europe to shift them to the Indo-Pacific. He warned that abandoning Ukraine would eventually erode U.S. credibility in deterring any potential conflict with China over Taiwan.

Ukraine is ready to resume direct peace talks with Russia in Istanbul on Monday, a top adviser to President Volodymyr Zelenskyy said, following days of uncertainty over whether Kyiv would attend a further meeting proposed by Moscow.

But Ukrainian officials have insisted that the Kremlin provide a promised memorandum setting out its position on ending the more than three-year war, before the two delegations sit down to negotiate.

Senior Iranian officials on Thursday dismissed speculation about an imminent nuclear deal with the United States, emphasizing that any agreement must fully lift sanctions and allow the country's nuclear program to continue.

"Iran is sincere about a diplomatic solution that will serve the interests of all sides. But getting there requires an agreement that will fully terminate all sanctions and uphold Iran's nuclear rights—including enrichment," Abbas Araghchi, the country's foreign minister, wrote in a post on the X.

Russia and Ukraine both want a ceasefire to halt three years of war, Turkey's top diplomat said on Friday as he headed to Kyiv after holding talks in Moscow.

"I observe that the issue is beginning to take a more optimistic turn as negotiations start. Both parties want a ceasefire. No one says they don't want it," Foreign Minister Hakan Fidan said on the train taking him to Kyiv, reported news agency Anadolu.