Iran Has Begun Installing New Uranium Centrifuges
According to the United Nation's nuclear watchdog agency
Iran has begun installing advanced centrifuge machines for enriching uranium at its nuclear plant at Natanz, says the UN's nuclear watchdog.
The IAEA said it suspected Iran may have also held explosives tests relevant to nuclear weapons.
The step will concern world powers ahead of a resumption of talks with Tehran next week, analysts say.
