UN nuclear chief warns clean-up activities at suspected Iranian nuclear site continue, expresses optimism over talks.
The IAEA says it has "credible" evidence that Tehran conducted tests in a steel chamber at Parchin "relevant to the development of a nuclear explosive device" and has repeatedly asked Iran to grant it access to the facility.
The IAEA says it has "credible" evidence that Tehran conducted tests in a steel chamber at Parchin "relevant to the development of a nuclear explosive device" and has repeatedly asked Iran to grant it access to the facility.