In a confidential report, the International Atomic Energy Agency (IAEA) said that it had closed two safeguards-related inquiries with Iran. One was related to inspectors' discovery of uranium particles enriched to 83.7% purity at Iran's Fordow enrichment site earlier in the year. The IAEA said Iran's explanation that the particles were a byproduct of fluctuations in the enrichment process was "not inconsistent" with data reviewed by the Agency. The other inquiry was related to traces of man-made uranium found at Marivan, a site linked to Iran's early-2000s secret military nuclear program. The IAEA said Iran's claim that the uranium traces were left by instruments used at a mine operated in the area by a foreign entity in the 1960s and 70s was "possible." The Agency also reported that it had re-installed enrichment monitoring devices at Fordow and Natanz and had installed cameras at a centrifuge workshop in Isfahan.