The Israel Defense Forces released footage on Saturday, May 9, showing strikes on "two loaded and ready-to-use launchers in southern Lebanon." (Credit: IDF)

The Lebanese government filed a sharply worded complaint with the United Nations arguing that the Islamic Republic of Iran has abused diplomatic immunity by refusing to recall its ambassador after Beirut demanded his expulsion and to stop alleged terrorist activities on its soil, according to a recently surfaced letter from late April.

The disclosure of the letter, which is reportedly a precedent-setting move by Lebanon, comes amid a second day of talks in Washington between Israel and Lebanon to normalize relations (the countries are in a state of war) and dismantle the Iranian-regime-backed Hezbollah terrorist movement in Lebanon.

A U.S. State Department spokesperson told Fox News Digital on Friday that "The United States facilitated talks between Israel and Lebanon have resumed today and are ongoing. The atmosphere of talks has been very positive, even exceeding expectations."

FAMILY OF AMERICAN HOSTAGE TORTURED IN LEBANON WINS LANDMARK CASE AGAINST IRAN

A mourner holds a portrait of Iran's supreme leader Ayatollah Ali Khamenei during a funeral procession on March 5, 2026, for members of Iraq's pro-Iran paramilitary group Kataeb Hezbollah killed in a strike in Baghdad the previous day. (Ahmed Al-Rubaye/AFP via Getty Images)

State Department spokesman Tommy Pigott wrote on X on Friday that "On May 14 and 15, the United States hosted two days of highly-productive talks between Israel and Lebanon. The April 16 cessation of hostilities will be extended by 45 days to enable further progress. The State Department will reconvene the political track of negotiations on June 2 and June 3."

He added that, "In addition, a security track will be launched at the Pentagon on May 29 with military delegations from both countries. We hope these discussions will advance lasting peace between the two countries, full recognition of each other’s sovereignty and territorial integrity, and establishing genuine security along their shared border."

As the sides report back to their capitals, the potentially game-changing letter in which Lebanese ambassador to the U.N. Ahmad Arafa, slammed Iran for inserting alleged terrorists from Iran’s Islamic Revolutionary Guard Corps (IRGC) into Lebanon "under the guise of diplomatic activity," has given hope to critics of Iran and Hezbollah.

Arafa said, according to the letter, that Iran committed "unlawful acts in blatant defiance of the decisions of the Government of Lebanon." He continued, "This Iranian conduct constitutes direct and blatant interference in the internal affairs of Lebanon and drags the country into a war it did not choose to become involved in."

Michael Needham, counselor for the U.S. Department of State, U.S. Ambassador to the United Nations Mike Waltz, Secretary of State Marco Rubio, U.S. Ambassador to Lebanon Michel Issa, Lebanese Ambassador to the U.S. Nada Hamadeh Moawad, and Israeli Ambassador to the U.S. Yechiel Leiter pose for a photo before a meeting at the State Department in Washington, D.C., on April 14, 2026. (Jacquelyn Martin/AP)

The U.S. and the European Union have classified the IRGC as a terrorist entity.

The letter took the Iranian Ambassador to Beirut, Mohammad Reza Sheibani, to task for "blatant interference" in Lebanon.

According to Lebanon’s U.N. letter, Beirut argued that Iran is violating the 1961 Vienna Convention on Diplomatic Relations and interfering in Lebanon’s state of affairs.

IDF SOLDIERS ACCUSE UN PEACEKEEPERS OF ENABLING HEZBOLLAH TERRORISTS AMID INCREASING CEASE-FIRE VIOLATIONS

Iranian protesters carry flowers in front of a large banner of Hezbollah Secretary General Hassan Nasrallah during a protest in Tehran on Sept. 30, 2024, condemning an Israeli air strike on Hezbollah's Beirut headquarters and the killing of Nasrallah and IRGC Quds Force commander General Abbas Nilforoushan. (Morteza Nikoubazl/NurPhoto)

When asked about the details of the letter, a spokesperson for Lebanon’s ambassador to the U.S. declined to comment. The spokesperson also declined to weigh in on the current talks with Israel in Washington.

Walid Phares, a leading U.S. expert on Lebanon and the Mideast, told Fox News Digital that "Many have considered the Lebanese memo to the U.N. as the start of the Lebanese government change of attitude towards Iran and a sign of escalation by Beirut. While the tone of the letter and its narrative make people feel that there is a government resistance to Iran and Hezbollah reality is still lesser."

He added that "The subject of the last quarrel is a legal change of status regarding the presence of Iranians on Lebanese soil. The Lebanese government has decided not to grant Iranians, government, and private citizens an automatic visa waiver, which upset Iran and Hezbollah. Besides, Tehran is furious at the fact that the Lebanese government has not been helpful in dealing with the elimination of a number of IRGC members killed in Lebanon by Israel. Tehran blames the foreign ministry of Lebanon, particularly foreign minister Youssef Raggi, for the ‘lessening of solidarity with Iran."'

Smoke rises from Israeli airstrikes in Dahiyeh, a southern suburb of Beirut, Lebanon, on April 5, 2026. (Emilio Morenatti/AP)

According to Phares, "Raggi represents a Lebanese Christian bloc in the parliament, who is not sympathetic to the regime. However, the actual talks in D.C. are designed by the Lebanese government to show the Trump administration that the ‘state wants to talk’ but not to reach an agreement that would trigger Hezbollah's wrath. The leaders of the Lebanese state are not yet where the U.S. and Israel expect them to be."

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A regional official well-versed in the U.N. dispute told Fox News Digital that Lebanon "argued that Iran had not given the Lebanese foreign ministry the list of all Iranians and the details about their place of stay. And that’s why Israel targeted that hotel in Lebanon in which six were killed, which is true."

The official said that "Iran had not told the foreign ministry of Lebanon about those six people."

Benjamin Weinthal reports on Israel, Iran, Syria, Turkey and Europe. You can follow Benjamin on Twitter @BenWeinthal, and email him at benjamin.weinthal@fox.com

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