"Avenging" Khamenei is "inevitable," warns Iran's supreme leader.

Iran's supreme leader, Mojtaba Khamenei, warned on Saturday that "revenge" was "inevitable" after the funeral of his father, killed in the Israeli-American attacks, as Donald Trump accused the Islamic Republic of wanting to assassinate him.

For his part, the Iranian representative to the UN, Amir Saeid Iravani, warned that his country would no longer feel bound by the memorandum of understanding concluded in June between Iran and the United States if they "continue to fail to meet their obligations", according to state television.

The Ayatollah spoke in a written message dated Friday but released Saturday, for the first time since the state funeral of his father and predecessor, Ali Khamenei, who was buried on Thursday.

- US Army "ready" -

"I tell our martyred leader that we swear to avenge his pure blood and that of all the martyrs of these two wars," wrote Mojtaba Khamenei, appointed supreme leader in March but who has not appeared in public since. "This vengeance is the will of our nation and it must be carried out, inevitably."

"These criminals, whose names are on a list, will take to their graves the wish for a peaceful death in their beds," he added.

On Friday, Donald Trump accused Iran of wanting to assassinate him, returning to his bellicose tone by promising once again to annihilate the country.

"The US military is prepared (...) for a period of one year, which may be extended, to decimate and completely destroy all areas of Iran," the US president wrote on Truth Social.

He added that "1,000 missiles" were "pointed towards the Islamic Republic", with "thousands more" available.

This hardening of rhetoric follows exchanges of blows this week, which have since ceased.

The United States struck Iran two nights in a row starting Tuesday after blaming Tehran for attacks on three commercial ships in the strategic Strait of Hormuz, through which a fifth of the world's hydrocarbon trade passed before the war.

According to the Iranian Ministry of Health, 17 Iranians were killed and 115 injured.

While Washington claims to have targeted military sites, Tehran accuses it of also hitting civilian infrastructure in order to prevent Iranians from attending Khamenei's funeral.

Iran, for its part, targeted its Gulf neighbors: Kuwait, where at least one person was injured, Bahrain and Qatar.

The head of the Supreme National Security Council, Mohammad Bagher Zolghadr, warned on Friday that his country would retaliate "to any attack" against its infrastructure, including by attacking Israel.

Although Donald Trump stated this week that the ceasefire was "over", he nevertheless agreed to continue negotiations with Iran.

And the mediators are working to get them back on track.

- Diplomatic negotiations -

On Friday, a delegation from Qatar, the mediating country, visited Iran, according to local media.

And on Saturday, Iranian Foreign Minister Abbas Araghchi was received by his Omani counterpart Badr al-Busaidi to discuss the Strait of Hormuz, a passage located in Iranian and Omani waters.

According to the Omani news agency ONA, "both parties agreed to continue discussions at the technical and political levels in order to reach the necessary agreements in compliance with international law."

Iran had blocked the strait in retaliation for the Israeli-American attack on February 28 that triggered the war.

It now allows only one navigation corridor, along its coasts, and excludes any return to the pre-war situation, when passage was free, although the law of the sea provides for freedom of navigation "without hindrance".

According to Axios and the American media outlet Politico, Washington informed Tehran that it was giving them until Saturday to publicly commit to no longer attacking ships in Hormuz.