The United States would be held responsible in the event of an Israeli attack on Iranian nuclear sites, Iran’s foreign minister has warned, after CNN reported that Israel could be preparing strikes.

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

Tehran has consistently denied seeking a bomb and insisted its nuclear programme is for civilian purposes.

“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,” Foreign Minister Abbas Araghchi said in a letter addressed to United Nations Secretary-General Antonio Guterres.