VIENNA: Satellite images of an Iranian military facility appear to show trucks and earth-moving vehicles at the site, indicating an attempted cleanup of radioactive traces possibly left by tests of a nuclear-weapon trigger, diplomats told American news agency on Wednesday.

According to The Associated Press, The assertions from the diplomats could add to the growing international pressure on Iran over its nuclear program, which Tehran insists is for peaceful purposes.

Two of the diplomats said the crews at the Parchin military site may be trying to erase evidence of tests of a small experimental neutron device used to set off a nuclear explosion. A third diplomat could not confirm that but said any attempt to trigger a so-called neutron initiator could only be in the context of trying to develop nuclear arms.

The diplomats said they suspect attempts at sanitization because some of the vehicles at the scene appeared to be trucks and other equipment suited to carting off potentially contaminated soil from the site.