Revolutionary Guard's Gholam Reza Jalali says nuclear facilities' vulnerability from a possible strike is "already minimal" but that they still might be moved for greater protection. His remarks were carried Wednesday by the semi-official Mehr news agency.
Both the U.S. and Israel have not rule out a military option against Iran's controversial nuclear program, which the West suspects is aimed at making atomic weapons. Iran denies the charge.
Iran's main uranium enrichment site in Natanz is built partly underground and the long-secret Fordo facility was built deep inside a mountain.