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UN nuclear chief 'positive' over Iran talks

The head of the UN nuclear watchdog has arrived in Tehran, voicing optimism about reaching agreement on Iran's controversial nuclear programme.

Yukiya Amano, of the International Atomic Energy Agency, is due to hold talks with Iran's chief nuclear negotiator, Saeed Jalili.

His visit comes ahead of a meeting in Baghdad between six world powers and Iran on Wednesday.

Bethany Bell reports.

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