By Pam O'Toole
BBC News
A group of ambassadors from non-aligned countries is due to arrive in Iran for what is being billed as a transparency visit to Iran's nuclear facilities.
It is the first such trip since the UN imposed limited sanctions on Iran in December for refusing to suspend its uranium enrichment programme.
The UN's chief nuclear inspector is to report on Iran's compliance with the Security Council's demands this month.
Some countries suspect Iran of secretly trying to develop a nuclear weapon.
Iran insists on its right under the Nuclear Non-Proliferation Treaty to enrich uranium on its own soil for what it says is a peaceful nuclear programme.
Surveillance cameras
Details of the delegation's itinerary have not been officially released, but the Iranian media say the group is expected to visit Iran's uranium conversion plant at Isfahan.
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