An Iranian flag is pictured at the United Nations headquarters in New York, Jan. 8, 2020. (Xinhua/Li Muzi)

The Trump administration's latest sanctions against Iran came after the overwhelming majority of Security Council members asserted that the United States has no right to invoke the "snapback" mechanism as it has withdrawn from the Iran nuclear deal.

WASHINGTON, Sept. 21 -- The United States on Monday announced fresh sanctions and measures against entities and individuals related to Iranian nuclear and conventional weapons programs, a move to support its self-claimed UN snapback sanctions widely ignored by the international community.

President Donald Trump said that he had issued an executive order to impose sanctions and export controls on more than two dozen entities and individuals "that support Iran's nuclear, missile, and conventional arms-related activities."

"The Executive Order I am issuing today blocks the property, and interests in property, in the United States of those who contribute to the supply, sale, or transfer of conventional arms to or from Iran, as well as those who provide technical training, financial support and services, and other assistance related to these arms," Trump said in a White House statement.

Secretary of State Mike Pompeo, standing with other senior U.S. officials in a press conference, said that the United States had also designated Venezuelan President Nicolas Maduro for his alleged ties with Tehran on conventional arms-related activities.