Iran warns Israel and US against any attack on its nuclear sites

The United States would bear legal responsibility in the event of an Israeli attack on Iranian nuclear facilities, Foreign Minister Abbas Araqchi said on Thursday, following a CNN report that Israel might be preparing strikes on Iran.

Iran and the US, Israel's closest ally, will hold a fifth round of nuclear talks on Friday in Rome amid deep disagreement over uranium enrichment in Iran, which Washington says could lead to developing nuclear bombs. Iran denies such intent.

“Iran strongly warns against any adventurism by the Zionist regime of Israel and will decisively respond to any threat or unlawful act by this regime,” Araqchi said in a letter addressed to United Nations Secretary-General Antonio Guterres.

Araqchi said Iran would view Washington as a “participant” in any such attack, and Tehran would have to adopt “special measures” to protect its nuclear sites and material if threats continued, and the International Atomic Energy Agency watchdog would be subsequently informed of such steps.

Although Araqchi did not specify what measures were being considered, an adviser to Iran's Supreme Leader said in April that Tehran could suspend cooperation with the IAEA or transfer enriched material to safe and undisclosed locations.

In a separate statement released on Thursday, Iran’s elite Revolutionary Guards warned Israel would receive a "devastating and decisive response" if it attacks Iran.

"They are trying to frighten us with war but are miscalculating as they are unaware of the powerful popular and military support the Islamic Republic can muster in war conditions," Guards spokesperson Alimohammad Naini said.

A collapse of US-Iran negotiations or a new nuclear deal that does not alleviate Israeli concerns about Iran developing nuclear weapons through enrichment could motivate Israeli strikes on its regional arch-foe, diplomats say.

Later on Thursday, Araqchi said in a televised interview that if the United States aims to end uranium enrichment then there will be no nuclear deal.

"They have said [U.S. officials]... that they do not believe in enrichment in Iran... and it has to stop completely, if this is their goal there will be no deal", Araqchi said in the interview carried by state TV.

The Iranian foreign minister said the idea of a uranium enrichment consortium with the participation of other nations is not bad, but will not replace enrichment on Iranian soil.

On Tuesday, Iranian Supreme Leader Ayatollah Ali Khamenei said US demands that Tehran stop refining uranium were "excessive and outrageous," and he voiced doubt over whether talks on a new nuclear deal would succeed. Tehran maintains its nuclear energy program is exclusively for civilian purposes.