Secretary of State Mike Pompeo insisted Sunday that any US military action against Iran would conform to international law after President Donald Trump was accused of threatening a war crime by declaring cultural sites as potential targets.
Tehran's foreign minister drew parallels with the Islamic State group's destruction of the Middle East's cultural heritage following Trump's tweets that sites which were "important to... Iranian culture" were on a list of 52 potential US targets.
And as Twitter was flooded with photos of revered Iranian landmarks in ancient cities such as Isfahan under the hashtag #IranianCulturalSites, leading US Democrats said the president would be in breach of international protocols if he made good on his threat.
"You are threatening to commit war crimes," Senator Elizabeth Warren, one of the top Democrats hoping to challenge Trump in November's election, wrote on Twitter.
"We are not at war with Iran. The American people do not want a war with Iran."
"Targeting civilians and cultural sites is what terrorists do. It's a war crime," added fellow Senator Chris Murphy.
In a flurry of interviews on the Sunday talkshows, Trump's top diplomat said the US would not hesitate to hit back hard against Iran's "kleptocratic regime" if it came under attack, but pledged that any action would be consistent with the rule of law.
"We'll behave lawfully. We'll behave inside the system. We always have and we always will," Pompeo told the ABC network's "This Week" program.
"The American people should know that every target that we strike will be a lawful target, and it will be a target designed with a singular mission, of protecting and defending America," he added.
AFP/File / Agustin PAULLIER Democratic Senator Elizabeth Warren, one of the top Democrats hoping to challenge Trump for the presidency, said he is "threatening to commit war crimes"
His comments came after his opposite number in Tehran Mohammad Javad Zarif tweeted that "targeting cultural sites is a WAR CRIME".
"A reminder to those hallucinating about emulating ISIS war crimes by targeting our cultural heritage: Through MILLENNIA of history, barbarians have come and ravaged our cities, razed our monuments and burnt our libraries," said Foreign Minister Zarif.
"Where are they now? We're still here, & standing tall."
- Threat 'Un-American' -
Nicholas Burns, who served as US ambassador to NATO under president George W. Bush, said the Trump administration would be guilty of hypocrisy given it was part of international efforts to deter IS from destroying countless pre-Islamic artefacts, including in the Syrian UNESCO-listed site of Palmyra.
"Donald Trump's threat to destroy Iranian cultural sites would be a war crime under UN Security Council resolution 2347 – supported by the Trump Administration itself in 2017 to warn ISIS+Al Qaeda of similar actions.
"His threat is immoral and Un-American," said Burns who is now a professor at Harvard University's John F. Kennedy School of Government.
AFP/File / WAKIL KOHSAR Trump's threat drew comparisons with the Taliban's destruction of the Bamiyan Buddhas in Afghanistan, which once stood at this site
Others drew comparisons with the Taliban's 2001 destruction of the Bamiyan Buddhas in central Afghanistan
Pompeo refused to give any details on the 52 potential targets which Trump said had been drawn up to represent each and every hostage held in the standoff at the US embassy in Tehran four decades ago.
But one former official expressed skepticism that military planners would agree to target cultural sites.
"For what it's worth, I find it hard to believe the Pentagon would provide Trump targeting options that include Iranian cultural sites," said Colin Kahl who was National Security Adviser to former vice president Joe Biden.
"Trump may not care about the laws of war, but DoD (Department of Defense) planners and lawyers do... and targeting cultural sites is war crime."