The International Atomic Energy Agency is "increasingly concerned" about possible activity in Iran to develop a nuclear payload for a missile, the IAEA said in a confidential report obtained by Reuters on Friday.
The U.N. nuclear agency's report said it continued to receive new information adding to such worries.
The IAEA's information had come from many states and also through its own efforts, and was "broadly consistent and credible in terms of technical detail, the time frame in which the activities were conducted and the people and organisations involved."
The developments highlighted in the IAEA's latest quarterly inspection report are likely to fan Western suspicions about the underlying nature of Iran's nuclear activity, which Western powers suspect is aimed at developing atom bombs.
It could provide additional arguments for the United States and its European allies to further tighten sanctions pressure on Iran, one of the world's largest oil producers. more