Satellite imagery revealing potential nuclear cover-up activity in Iran. Photo: ISIS.

According to the quarterly report issued by the United Nations nuclear watchdog, the International Atomic Energy Agency (IAEA), Iran has doubled its uranium enrichment capacity at its underground facility in Fordow.

Fordow, 130 kilometers from Tehran, is the location where many in the West suspect that Iran is secretly carrying out its nuclear program.

The IAEA report states that the number of centrifuges at Fordow increased to 2,140 from 1,064 in May, but adds that the new centrifuges are not operational yet.

Additionally, the IAEA expressed concerns about Parchin, another military site south of Tehran that it wants to inspect for evidence of past nuclear weapons development.

“Since 2002, the Agency has become increasingly concerned about the possible existence in Iran of undisclosed nuclear related activities involving military related organizations, including activities related to the development of a nuclear payload for a missile,” IAEA Director-General Yukiya Amano wrote in the report.