A claim this dangerous deserves to be taken apart into its pieces, because only some of them are established. Iran says the United States struck the Darkhovin nuclear-plant construction site - the Karun reactor, in Khuzestan province - with 'multiple projectiles' in the early hours of July 19 [2][3]. By Monday its foreign ministry was demanding the head of the IAEA 'clearly state his position in condemnation of the US crime,' warning that silence 'would further undermine Tehran's confidence in the agency' [3].
Here is what the IAEA has actually said. It is investigating reports concerning an attack at the site - reports, its word, not a finding [2]. It confirmed three physical facts: the site contained no nuclear material at the time of its most recent inspection; the facility - a 300-megawatt pressurized light-water reactor begun in December 2022 - is in very early construction; and there is no radiological risk [1][2]. Rafael Grossi called for 'military restraint in the vicinity of all nuclear-related sites' and repeated the agency's position that attacks on peaceful nuclear facilities are 'unacceptable' [1].
What no one but Iran has established is who struck the site, or formally that a strike occurred at all. The United States has neither confirmed nor denied [2]. The IAEA has attributed nothing. At least one regional outlet's headline - that the agency 'verifies' an attack - overstates the agency's own careful language, and the overstatement is doing work in both directions: it feeds Tehran's case for escalation and it pressures the investigator before the investigation [2][3].
The reason to keep the pieces separate is the reason the norm exists. An established deliberate strike on a nuclear facility would be a grave breach with consequences to match; an asserted one, adopted uncritically, becomes a weapon in the war it describes [1][2]. The agency whose job is telling those apart is asking for room to do it - that is the record, and for now it is the whole record [1][2][3].