The Iranian Foreign Minister spoke by phone with the director of the UN's nuclear watchdog agency early Sunday morning after a report from the agency said Iran is further increasing its stockpile of uranium enriched to near weapons-grade levels.

Writing on Telegram, Abbas Araghchi said he stressed Iran's "continuous cooperation" in his conversation with Rafael Mariano Grossi, the head of the Vienna-based International Atomic Energy Agency. The IAEA did not immediately return a request for comment about the phone call.

The confidential IAEA report, which was seen by the Associated Press on Saturday, raised a stern warning, saying that Iran is now "the only non-nuclear-weapon state to produce such material" - something the agency said was of "serious concern."

Araghchi emphasized to Grossi that all of Iran's nuclear activities are within the framework of agreements and being monitored by the IAEA. The IAEA said in a separate report that Iran's cooperation with the agency has been "less than satisfactory" when it comes to uranium traces discovered by IAEA inspectors at several locations in Iran that Tehran has failed to declare as nuclear sites.

Araghchi also asked Grossi to ensure "that certain parties do not exploit the agency for political agendas against the Iranian people." European nations could take further steps against Iran based on the comprehensive report, leading to a potential escalation in tensions between Iran and the West. 

Iran's deputy foreign minister on Sunday published a detailed response, rejecting many of the report's findings. Kazem Gharibabadi noted that out of the IAEA's 682 inspections of 32 states, 493 were carried out in Iran alone.

"So long as a country's nuclear activities are under the IAEA's monitoring, there is no cause for concern," he said. "The Islamic Republic of Iran is neither pursuing nuclear weapons nor does it possess any undeclared nuclear materials or activities." 

Oman min presents US nuke deal proposal to Iran

Tehran: Iran's foreign minister Abbas Araqchi has announced that his Omani counterpart Badr Al Busaidi to Tehran, during his visit to Tehran, has presented the elements of the US proposal to Iran for a nuclear deal between the two countries, state media reported.

"My dear brother @badralbusaidi, distinguished Foreign Minister of Oman, paid a short visit to Tehran today to present elements of a US proposal which will be appropriately responded to in line with the principles, national interests and rights of the people of Iran," Araqchi wrote in a post on his X account.

According to the official news agency IRNA, Iran and the US have held five rounds of talks -- three in Muscat and two in Rome--mediated by Omani Foreign Minister Sayyid Badr Al-Busaidi. The talks sought to replace the agreement that President Donald Trump withdrew the US from during his first term in office.