The chief of the U.N. nuclear watchdog agency said Monday he cannot confirm all of Iran's nuclear activities are peaceful, carefully choosing his words after tensions were sparked by his recent suggestion that Tehran may be working on a secret arms program.
     
Members of the 35-nation International Atomic Energy Agency board were closely following IAEA head Yukiya Amano's statement opening the March board session to see if he would follow up on his hard-hitting Iran report issued last week.
     
In that document, Amano - who took the post in December - expressed concern that Iran may be working on making a nuclear warhead, suggesting for the first time that Tehran had either resumed such work or never stopped at the time U.S. intelligence thought it did.
     
Iran denies any interest in developing nuclear arms, contradicting a 2007 U.S. intelligence assessment concluding that Iran had worked on such weapons before apparently suspending such activities in 2003.

AP