Iran has agreed to hold a fourth round of indirect nuclear talks with the United States in Oman on Sunday, Iranian Foreign Minister Seyed Abbas Araghchi said on Friday. According to Iran's official news agency IRNA, Araghchi said that Iran has communicated with Oman, which mediates the talks, and that the talks are set to take place on Sunday. Iran is currently waiting for Oman to coordinate the specific start time of the negotiations. Regarding the progress of the negotiations, Araghchi said that in any case, the negotiations are moving forward, and it is natural that the more progress they make, the more consultations and reviews they will need. In addition, the delegations need more time to review the issues raised, Araghchi said. Iran and the United States have held three rounds of indirect talks so far -- the first and third in Muscat, capital of Oman, on April 12 and April 26, and the second in Rome, capital of Italy, on April 19. A fourth round had been scheduled for May 3 in Rome but was postponed due to what Oman described as "logistical reasons." Also on Friday, Araghchi held a phone call with Rafael Grossi, director general of the International Atomic Energy Agency (IAEA), to discuss the progress of the talks, the Iranian Foreign Ministry said in a statement. The two also reviewed bilateral cooperation on Iran's nuclear activities, which Iran insists are for peaceful purposes. Iran signed a nuclear deal, formally known as the Joint Comprehensive Plan of Action, with six world powers -- Britain, China, France, Germany, Russia, and the United States -- in 2015. Under the deal, Tehran agreed to curb its nuclear program in exchange for sanctions relief. The United States, led by President Donald Trump during his first term, unilaterally withdrew from the accord in 2018 and reimposed sanctions, prompting Iran to gradually reduce compliance with its nuclear commitments. Efforts to revive the agreement have not achieved substantial progress. Shotlist: Beijing, China - May 10, 2025: 1. Screenshot of report of Iran's official news agency IRNA about fourth round of indirect nuclear talks between Iran and U.S.; FILE: Iran - Date Unknown 2. Various of traffic, national flags of Iran; FILE: Iran - March 2024 3. National flags of Iran; traffic; FILE: Tehran, Iran - April 10, 2023 4. National flag of Iran; overpass; FILE: Washington D.C., USA - October 2024 5. Various of White House; 6. Various of Capitol building, U.S. national flag; FILE: New York, USA - October 2024 7. Various of traffic; FILE: Muscat, Oman - Feb 23, 2025 8. Oman's Foreign Ministry building, national flag of Oman; FILE: Muscat, Oman - Date Unknown 9. Sultan Qaboos Grand Mosque. [Restriction - No access Chinese mainland/Al-Arabiya/Persian language TV Stations outside Iran. Strictly No Access BBC Persian/VOA Persian/Manoto TV/Iran International TV]