CAIRO — Iranian, Egyptian and United Nations leaders met in Cairo on Monday to discuss Iran’s nuclear program after the U.N. nuclear watchdog agency in a confidential report said Iran is further increasing its stockpile of uranium enriched to near weapons-grade levels.

The report emerged amid U.S.-Iran talks aimed at attempting to limit Iran’s nuclear program in exchange for lifting some of the crushing economic sanctions that the U.S. has imposed on the Islamic Republic, which have strained relations for almost 50 years.

Rafael Mariano Grossi, director-general of the Vienna-based International Atomic Energy Agency, said the agency compiled its report, seen by The Associated Press over the weekend, because Iranian’s uranium enrichment is an ongoing concern for the IAEA’s board of governors.

The confidential report, which said Iran had amassed 900.8 pounds of uranium enriched up to 60%, raised a warning, saying Iran is now “the only non-nuclear-weapon state to produce such material.”

— The Associated Press