Iran insisted Friday it had no hidden nuclear activities and said the International Atomic Energy Agency was welcome to inspect any nuclear facilities in the country it had information about. Reacting to comments by U.S. officials that it has been secretly developing two facilities which could be used to make nuclear weapons, government spokesman Abdollah Ramazanzadeh said: "We don't have any hidden atomic activities. All our nuclear activities are for non-military fields," he told reporters. "The International Atomic Energy Agency is informed about our (nuclear) activities and the use of nuclear material either for research, chemical or medicine." And they can visit wherever in Iran that either we have informed them about or they have information about," he added. U.S. officials, who spoke to Reuters in Washington on condition of anonymity Thursday, said nuclear facilities near the central Iranian towns of Natanz and Arak, were seen in commercial satellite photographs taken in September. The facilities are of a type that suggest Iran may be using them to build a nuclear weapon, the officials said. (Reuters)