The day began with Iranian media highlighting Europe's first post-war contact, delivering a nuclear ultimatum regarding the "trigger mechanism" for restoring UN sanctions if talks didn't resume. Tehran, through Foreign Minister Araqchi, swiftly rejected this mechanism as unethical and illegal, asserting any new negotiations required a fair and balanced deal. This stance solidified as the US and European ultimatum was officially conveyed, with Iran demanding "a fair agreement or nothing" and rejecting policies of threat. Concurrently, a New York Times report suggested the Fordow underground site might be destroyed, adding a layer to the ongoing nuclear facilities debate from previous days. A significant new development emerged in the evening with Iran's Intelligence Minister admitting mutual intelligence infiltration with Israel, coinciding with an Israeli counter-espionage campaign. Regional military commanders issued warnings against renewed aggression.