Iran on Thursday stood by its decision to deny U.N. nuclear inspectors access to sites where they have questions about past activities, arguing that the agency’s case is based on “fabricated” Israeli intelligence. The International Atomic Energy Agency, which is policing Iran’s troubled nuclear deal with major powers, sounded an alarm on Tuesday over a lack of Iranian cooperation in clearing up what the IAEA suspects are undeclared activities and materials dating back to the early 2000s. Iran has denied it access to two sites. Diplomats who follow the IAEA say the decision to inspect those sites to take environmental samples was based at least in part on a trove of documents Israel says its intelligence agents seized in Iran. Israel calls it an “archive” of past activities. “The Islamic Republic of Iran does not want to set a bad precedence by giving legitimacy to such alleged information,” Iran’s mission to the IAEA in Vienna said in a statement.