The global nuclear watchdog, the IAEA, has ended its 12-year investigation into concerns that Iran might be developing nuclear weapons.
The move is seen as a key step towards lifting UN, EU and US sanctions.
The IAEA concluded that Iran conducted nuclear weapons-related research until 2003 and to a lesser extent until 2009, but found no evidence of this since.
The lifting of sanctions, agreed in a July deal with world powers, hinged on the IAEA's findings on the issue.
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