Iran-UN nuclear talks postponed

Iran has been enriching uranium at its underground facility in Natanz

A meeting between Iran's chief nuclear negotiator and the head of the UN's nuclear watchdog agency has been postponed, Iranian media have said.

The official news agency Irna gave no reason for the postponement of the meeting between Gholamreza Aghazadeh and the UN's Mohamed ElBaradei.

The meeting was intended to take place in Vienna on Monday.

Last month, the UN Security Council approved a third round of sanctions on Iran over its nuclear programme.

It wants Iran to suspend its uranium enrichment.

Many Western nations fear Iran is pursuing nuclear weapons but Tehran says its programme is for purely peaceful energy purposes.

Irna said the meeting with the UN's International Atomic Energy Agency would take place at a more "appropriate time".

There has been no official IAEA comment.

Iran said last week it had started to install 6,000 more uranium enrichment centrifuges at its Natanz plant.

The five permanent members of the UN Security Council, along with Germany, will meet on Wednesday to discuss the Iran issue.