The head of Iran's Atomic Energy Organization, Ali Akbar Salehi, said Sunday that if Iran left the seven-power deal designed to prevent it from making nuclear weapons, it could begin enriching uranium to weapons-grade within four days.

Salehi, who is also the nation's vice president, was quoted by state television as saying if Iran found the nuclear deal was not protecting its interests, "we can re-start 20 percent enrichment in four days. The other side knows what that means."

He also said Iran is committed to giving International Atomic Energy Agency inspectors access to its nuclear facilities only as long as the nuclear deal remains in force.