Notwithstanding “the continued adherence by Iran” to its nuclear-related commitments under the Joint Comprehensive Plan of Action (JCPOA), the agreement is “at a crossroads” the United Nations top political official said on Wednesday.

Speaking the day after the United States withdrew from an international agreement on Iran’s nuclear programme, the head of the United Nations atomic watchdog agency made it clear that Iran has consistently stuck to its commitments.

The UN chief expressed optimism on Thursday that the full denuclearization of the Korean Peninsula could become a reality, following last week’s historic joint declaration from the leaders of the north and south, which eased months of rising tension over North Korea’s nuclear programme.

Iran is implementing a series of commitments under the nuclear agreement reached with key countries in 2015, the head of the United Nations nuclear energy agency said Monday.