By Elise Labott
Two western diplomats tell CNN that satellite images reviewed by the International Atomic Energy Agency show trucks and earth-moving vehicles at the Iranian military site from which international inspectors have been denied access to. The description provides further clarity to IAEA concerns, first reported by CNN's Matthew Chance last week, that the Iranians were trying to clean up the Parchin facility.
But the sources say while the imagery does show clean up activity, it's not clear what the Iranians might be cleaning up.
The Iranians said this week said they would relent and allow IAEA inspectors in but it comes amidst what diplomatic sources tell CNN is evidence Iran is "undoubtedly" trying to clean up any evidence before allowing the inspection.
The IAEA suspects that research on triggers for nuclear weapons is being carried out at the site. It a recent report the agency said experiments with a nuclear detonation system had been conducted inside a large metal container at Parchin.
The head of the U.N.'s nuclear watchdog agency told CNN's Matthew Chance on Wednesday that Iran could have facilities that it has not declared to inspectors "and we have the indication or information that Iran has engaged in activities relevant to the development of nuclear explosive devices."