VIENNA (AP) — The United Nations' atomic watchdog hasn't been able to access data important to monitoring Iran's nuclear program since late February when the Islamic Republic started restricting international inspections of its facilities, the agency said Monday.

The International Atomic Energy Agency reported in a confidential document distributed to member countries and seen by The Associated Press that it has "not had access to the data from its online enrichment monitors and electronic seals, or had access to the measurement recordings registered by its installed measurement devices" since...