UN inspectors have arrived in Iran where they are due to visit a previously secret nuclear facility.
The plant is near the city of Qom and the UN officials are expected to remain in the country for three days.
The visit comes as further difficulties are experienced by the major powers trying to agree a deal with Iran over its nuclear programme.
Under a new proposed plan, Iran would send its enriched uranium away to be turned into fuel.
The inspection will be the first time monitors from the United Nation’s nuclear watchdog, the International Atomic Energy Agency (IAEA), have been allowed access to the enrichment plant.
