Iranian Nuclear Program

Iran: US threatens nuclear deal, warns of 'strong reaction'

Iran's nuclear chief warned the United States on Monday of a "firm and strong reaction" if it persists in actions he says are endangering a nuclear deal aimed at curbing programs that Tehran could use to make atomic arms.

Ali Akbar Salehi was alluding to a bill before President Barack Obama that would extend U.S. sanctions under the Iran Sanctions Act l by 10 years. The bill was submitted to Obama after the U.S. Senate voted to extend it last week.

The nuclear deal between Iran and the United States and five other world powers lifted international sanctions in exchange for limitations on the Iranian nuclear program. But U.S. sanctions remain and will expire on Dec....