A team of U.N. inspectors is in Iran to visit a recently revealed but still unfinished uranium enrichment facility near the holy city of Qom to verify it is for peaceful purposes.

The revelation last month by Iran of the facility's existence, known as Fordo, raised international suspicion over the extent and aim of the country's nuclear program.

But Iran says that by reporting the existence of the site voluntarily to the U.N.'s nuclear watchdog, it "pre-empted a conspiracy" against Tehran by the U.S. and its allies who were hoping to reveal the site as evidence that Iran was developing its nuclear program in secret.

Iran insists its nuclear program serves to generate power and denies allegations it is trying to make nuclear weapons.