Iranian President Hassan Rouhani has said the United States has failed to undermine a nuclear deal between Tehran and major powers. He made the remarks in a speech aired live on state TV on Sunday.

Rouhani said termed the agreement as a “long-lasting victory" for Iran, Reuters said in a report.

“The American administration has failed to undermine the nuclear deal ... Trump, despite his repeated efforts, has failed to undermine the accord ... The deal is a long-lasting victory for Iran," Rouhani said.

His comment comes two day after, US President Donald Trump on Friday delivered an ultimatum to European signatories of the deal to fix the “terrible flaws” of the agreement with Iran, or the United States would pull out.

Iran has said that the nuclear deal is not renegotiable, and it will stick to the accord as long as the other signatories respect it but will "shred" the deal if Washington pulls out.

Under the deal, Iran agreed to curb its nuclear program, in exchange for lifting of most sanctions.