TEHRAN/WASHINGTON/BEIRUT/JERUSALEM/CAIRO - Iran's semi-official Fars news agency on Friday rejected a report by Saudi-owned Al Arabiya network that Tehran has agreed to transfer its enriched uranium to a third country.

Citing an informed source close to the Iranian negotiating team, Fars said nuclear issues were basically not on the current agenda of the talks between Tehran and Washington aimed at ending the conflict, and would only be discussed at later stages.

The denial follows an earlier report that Iran has informed Pakistan of its acceptance to transfer part of its enriched uranium to a third country.

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The source stressed that such a transfer is not being discussed, adding that the United States must take "clear and definitive" actions before "final agreements on some fundamental issues" can be reached.

Meanwhile, Iran's army said on Friday that its navy fired warning shots toward two US destroyers, DDG-103 and DDG-87 of the USS George H.W. Bush carrier strike group, in the Gulf of Oman, using "Qadir" cruise missiles and "Shahid Dana" drones.

In a statement on its website, the army said the destroyers subsequently left for the Indian Ocean.

The army described the operation as part of Iran's ongoing campaign to counter "maritime malicious acts and disruptions and the hijacking of commercial vessels and oil tankers by the Navy of the US terrorist army".

The US Central Command denied the incident had taken place, saying that Iranian forces did not fire at US Navy warships.

Explosions in Iran's Sirik, near Hormuz Strait

In another development, several explosions were heard in Iran's Sirik near the Strait of Hormuz early Saturday, Iranian media reported. 

Also on Friday, US forces struck some of Iran's radar sites, the US military said, in a fresh escalation that threatens the fragile ceasefire in the Middle East.

Lebanese president criticizes Iran over ceasefire stance

In an interview with CNN chief international anchor Christiane Amanpour, Lebanese President Joseph Aoun slammed Iran for using Lebanon as a bargaining chip in negotiations with the United States.

On Thursday, Iran's Islamic Revolution Guard Corps said in a statement that Iran's primary condition for accepting the April 8 truce with the United States and Israel was a comprehensive ceasefire on all fronts, including Lebanon.

"This is not your country; it is our country," said Aoun in the interview released by the Lebanese Presidency on Friday, noting it was unacceptable for regional powers to use Lebanon to advance their own interests while Lebanese civilians continued to bear the consequences of conflict through deaths, displacement, and destruction.

Egypt, Qatar, Saudi Arabia discuss situation in Iran

On Friday, Egyptian, Qatari, and Saudi top diplomats held separate phone calls to address rapid developments in the region, focusing on the Iranian crisis and the ongoing conflict in Sudan.

During two separate phone calls with Qatari Prime Minister and Minister of Foreign Affairs Sheikh Mohammed bin Abdulrahman bin Jassim Al Thani and Saudi Foreign Minister Prince Faisal bin Farhan bin Abdullah Al Saud, Egyptian Foreign Minister Badr Abdelatty reviewed the latest developments in the US-Iranian negotiations and diplomatic efforts to reach a consensual settlement that addresses the concerns of all parties, including the Gulf states, while enhancing regional security and stability, according to a statement by the Egyptian Foreign Ministry.

Clemency to over 2,000 convicts

Separately, Iran's Supreme Leader Mojtaba Khamenei has agreed to pardon or commute the sentences of more than 2,000 convicts on the occasion of religious holidays, the Mizan news agency of the Iranian judiciary reported on Friday.

The clemency was granted to mark two major religious holidays of Eid al-Adha and Eid al-Ghadir at the request of Iran's Judiciary Chief Gholamhossein Mohseni-Ejei, who submitted a list of those eligible for receiving it, the report said.

It does not apply to individuals convicted of security crimes, espionage, actions against the country's internal and external security, and individuals who have threatened the society's public security, Mizan quoted Iran's Deputy Judiciary Chief Ali Mozaffari as saying.

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Iran's supreme leader regularly grants clemency to prisoners on special occasions as per a right given to him by the country's constitution.