Work on fast-acting detonators that have "possible application in a nuclearexplosivedevice, and... limited civilian and conventional military applications".
BBC: UN nuclear agency IAEA: Iran 'studying nuclear weapons'
2.
The UN's nuclear watchdog says it has information indicating Iran has carried out tests "relevant to the development of a nuclearexplosivedevice".
BBC: UN nuclear agency IAEA: Iran 'studying nuclear weapons'
3.
There are also indications that some activities relevant to the development of a nuclearexplosivedevice continued after 2003, and that some may still be ongoing.
BBC: UN nuclear agency IAEA: Iran 'studying nuclear weapons'