The Atomic Energy Organization of Iran (AEOI) confirmed that “an incident occurred in one of the under-construction sheds in Natanz nuclear facility”, causing “no major damage” or casualties. The IAEA subsequently issued a statement indicating that it had “been informed about a fire in a building at the site of the Natanz uranium enrichment facility… Iran also informed the IAEA late on Thursday that the fire was quickly extinguished and that there had been no nuclear material or other radioactive material in the building”. “Iran said the cause was not yet known”, according to the agency. An Iranian official on 3 July claimed that the cause “has been specified precisely” but would “be announced in appropriate time due to some security considerations”.