Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Ex-IAEA Official: Iran's Apparent Explanation for Uranium at Tehran Site is Dubious Michael Lipin WASHINGTON - A former IAEA official says diplomats working with the U.N. nuclear agency do not believe Iran's apparent explanation for the presence of manmade uranium particles at a site in southern Tehran. In a report published Monday, the IAEA said its inspectors monitoring Iranian compliance with commitments to curb potential weapons-related nuclear activities had "detected natural uranium particles of anthropogenic (manmade) origin at a location in Iran not declared to the agency." The report, initially provided to IAEA member nations and later leaked to the media, did not identify the location of the particles or provide any other details about them. .