Iran's president has said that his country will stand up to the United States and reciprocate any new sanctions that America imposes on the Islamic Republic.
Hassan Rouhani's remarks came a day after the Trump administration announced new, non-nuclear sanctions on Iranians while at the same time warning Tehran that it would face consequences for breaching "the spirit" of the nuclear deal with world powers.
The new sanctions, perceived as the latest attempt to clamp down on Iran's military financing, target 18 Iranian individuals and groups, ranging from an Iranian-based company accused of aiding the country's drone program to a Turkey-based provider of naval equipment and a China-based network that helped secure electronics for Tehran.
If Washington, under any pretext, imposes new sanctions against Iran, "we will stand up to the United States," Mr Rouhani said, adding that the "great nation of Iran will have an appropriate answer" and that the Iranian parliament will also act.
He did not elaborate. His speech, at a weekly cabinet meeting, was broadcast on state TV.
The 68-year-old cleric and political moderate, who secured a resounding re-election over a hard-line opponent in May, has been increasingly outspoken against the US, calling relations with Washington "a curvy road" even as he touted the 2015 nuclear accord Iran secured with world powers.
The Trump administration on Monday confirmed that Iran had met its obligations under the 2015 nuclear deal, but warned the country it would face consequences for breaching "the spirit" of the accord - a reference to Iran's continued pursued of a ballistic missile programme.
Mr Rouhani speculated that such statements seek to dissuade Iran from continuing to comply with the nuclear deal.
The International Atomic Energy Agency already verified that Iran has lived up to its nuclear commitments.
"This plot will never succeed," he added. "We will always remain loyal to our international commitments."
Iran's foreign ministry in a statement condemned the latest US sanctions, calling them "mean and pointless" and said it will in return impose sanctions on more Americans.
Iran in April and May imposed reciprocal sanctions on dozens of American companies and individuals, alleging they support terrorism and repression against people in the region such as the Palestinians.