US Secretary of State Hillary Clinton has given a cautious welcome to Iran's announcement that it will open a newly revealed nuclear plant to inspection.
Speaking in New York, Mrs Clinton said it was always welcome when Iran decided to comply with international rules.
Earlier, US President Barack Obama stepped up the pressure on Iran following the discovery of a second nuclear plant in the country.
He said it showed a "disturbing pattern of evasion" by Tehran, and that talks planned for next week now had added urgency.
Sebastian Usher reports.
One-Minute World News 
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