Head of the Atomic Energy Organization of Iran (AEOI) Ali-Akbar Salehi said on Thursday that those wishing to violate the JCPOA will be taught an unforgettable lesson.

Speaking to the AEOI personnel, Salehi said within coming three to four months, Iran will encounter some very momentous bottlenecks on the way at international scenes and will have to pave the path appropriately and this to be attained through national solidarity and unity away from ordinary disputes.

The enemies should bear in mind that Iran has burdened numerous efforts to implement the Joint Comprehensive Plan of Action (JCPOA) and has never wished to witness its violation but under such circumstances and upon confirmation of the country's top officials, the intruders will be given an unforgettable lesson, Salehi said. 

Iran is to protect its interests and national sovereignty but in case the US withdraws from the treaty and the European and other big powers ignore to back the treaty, there will be no doubt that Iran will act differently, he said.

The New Year will be challenging year for Iran at international scene, underlined Salehi.