
The talks between Iran and the International Atomic Energy Agency (IAEA) are separate from - though still closely linked with - broader diplomacy between Tehran and six world powers over Iran's disputed nuclear activity.
In November, Iran and the IAEA agreed a cooperation pact, including six initial steps to be taken by the country over the following three months, including access to two nuclear-related facilities and the provision of information.
They said after a review meeting last month they would meet again in Tehran on Jan. 21 to discuss the next steps under the framework agreement.
An IAEA spokeswoman confirmed in an e-mail a report that the date of the meeting had been changed.
The IAEA wants Iran to address allegations that it has researched how to develop nuclear bombs, a charge Iran denies.
Tehran says the nuclear programme is entirely peaceful. Separately, Iran and the six powers - the United States, France, Germany, Britain, China and Russia - said on Sunday the implementation of a Nov. 24 landmark agreement to curb Tehran's atomic activity in return for some sanctions easing would begin on Jan. 20.
The IAEA will play a major role in verifying that Iran implements its part of the deal.
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