VIENNA - Iran has started enriching uranium deep inside a mountain, diplomatic sources said on Monday, a move likely to further escalate a dispute with the West over Tehran's atomic activities.
They said uranium enrichment to a fissile purity of 20 percent had begun at the Fordow underground site near the Shi’ite Muslim holy city of Qom.
Iran’s mission to the International Atomic Energy Agency, the Vienna-based U.N. nuclear watchdog, was not immediately available for comment.
