Iran to respond to Trump letter after scrutiny

Iran will respond to US President Donald Trump's invitation to talks after proper scrutiny, its foreign ministry says, accusing Washington of not matching actions with words.

Iran's Supreme Leader Ayatollah Ali Khamenei and President Masoud Pezeshkian have rejected Trump's letter and public exhortations for nuclear talks as deceptive and bullying.

But Foreign Ministry spokesperson Esmaeil Baghaei said a diplomatic response was in the works.

"So far, we have no reason to publicise (Trump's) letter ... Our response to this letter will be done through appropriate channels after full scrutiny," Baghaei said on Monday.

The Iranian spokesperson noted contradictory signals from Washington which was voicing readiness for talks while also applying new sanctions on Tehran's economy.

"Diplomatic negotiations have etiquette in that each side must recognise the other's interests and, more importantly, believe in fulfilling their commitments," Baghaei added during a televised press conference.

"The US does not respect that and uses the possibility of negotiations as a propaganda and political tool."

In his first term, Trump withdrew the US from a 2015 deal between Iran and major powers that had placed strict limits on its nuclear activities in exchange for sanctions relief.

After Trump pulled out in 2018 and re-imposed sanctions, Iran breached and far surpassed those limits in the development of its nuclear program.

Western powers accuse Iran of seeking nuclear weapons by enriching uranium up to 60 per cent purity, above what they deem is justifiable for a civilian program.

Tehran says the development of its nuclear program is for peaceful purposes and that it respects its commitments under international law.