Russia warned on Thursday against any attack on Iran's nuclear infrastructure as tensions grow with the United States over its nuclear program and after President Donald Trump threatened to bomb Iran if it doesn't reach a deal. Newsweek has reached out to the U.S. State Department for comment.

Russia is pushing back against threats from President Donald Trump to bomb Iran over how it handles its nuclear program, calling them "illegal and unacceptable."

U.S. President Donald Trump threatened Iran on Sunday with bombing and secondary tariffs if Tehran did not come to an agreement with Washington over its nuclear program, and the United States has moved additional warplanes into the region.

France's foreign minister warned on Wednesday that if world powers were unable to quickly reach a new agreement with Iran over its contested nuclear programme then a military confrontation seemed "almost inevitable".

President Donald Trump is considering indirect nuclear talks with Iran, according to a report by Axios, which cited two unnamed U.S. officials, while also preparing the ground for military strikes. Trump and Iran's Supreme Leader Ali Khamenei have exchanged letters in recent weeks.

US President Donald Trump said he believed that Iran was willing to engage in direct talks over its nuclear program, a day after Tehran indicated it would be willing to negotiate through intermediaries.