IAEA latest on Iran nuclear plans
9 November 2011 Last updated at 02:35 GMT
Iran could face new sanctions from the United States if its fails to deal with the latest concerns about its atomic programme.
The Americans were responding to a new report by the UN's nuclear watchdog, the IAEA, which accused Iran of carrying out activities which could lead to the development of a nuclear device.
The Iranian government says its nuclear programme is designed purely for peaceful purposes.
Jeremy Bowen reports