FNA- Head of the Atomic Energy Organization of Iran (AEOI) Ali Akbar Salehi warned that the 2015 nuclear deal between Tehran and the world powers can no more be implemented while sanctions against the country are still in place, stressing the need for the other side to increase efforts to open ways for Iran to expand its economic ties with other states.

"Continued implementation of the nuclear deal while sanctions are still in place is impossible and Mr. Salehi reminded this issue again in his today meeting with Mr. (Boris) Johnson (the British foreign secretary)," AEOI Spokesman Behrouz Kamalvandi said in an interview with the state TV on Sunday, elaborating on Salehi and Johnson's meeting.

"Mr. Salehi precisely raised issues related to the nuclear deal and our country's commitment to its nuclear deal undertakings and stated that the other side has not properly implemented its undertakings in different economic fields," he added.

Kamalvandi said that Salehi also reminded Johnson that the world powers should attempt to give Iran the merits of the nuclear deal.

His remarks came after Secretary of Iran's Supreme National Security Council Rear Admiral Ali Shamkhani lashed out at Washington for defying the nuclear deal with Tehran, describing the US attitude towards the Joint Comprehensive Plan of Action as "total disaster".

Speaking at a meeting with visiting Johnson here in Tehran on Saturday, the Iranian top security official reiterated Tehran's dissatisfaction in the volume of economic cooperation and exchanges after the nuclear deal, and asked London to facilitate banking relations to pave the ground for expanded economic ties.

He then blasted the European states and the US for defying their undertakings under the JCPOA, and said, "The US attitude towards the deal as proved to be a total disaster, and its continuation would place international agreements under question while ruins that country's political creditability."

Shamkhani underlined that decertification of the deal by the US president meant Washington's disloyalty to international agreements, and issued a stern warning against Donald Trump's continued disrespect for the deal.

"Given the passivity of other parties to the improper attitudes of Washington, the Islamic Republic of Iran has embarked on making the necessary decisions to counter such moves and restore the conditions prevailing before the agreement, on the basis of its national interests and responsibilities," he stated.