The US president said he had written a letter to Iran's supreme leader before talking about "final strokes" with Tehran, but questions have been raised regarding whether Russia's potential mediation will resolve the standoff.

Supreme Leader Ayatollah Khamenei has issued a warning to "bullying" Western powers and their calls for negotiations.

Russia’s Foreign Minister Sergei Lavrov landed in Tehran on Tuesday for talks with Iranian officials, Iranian state media reported, days after Moscow held initial talks with the U.S. just a month after Donald Trump returned to the White House.

There was a time when Americans were outraged by Russia’s invasion of Ukraine. What we witnessed three years ago violated our core values and convictions

President Donald Trump issued a warning to Iran in a Thursday letter, telling Tehran it can either "make a deal" regarding its nuclear program or face off with the U.S. "militarily."

"We are primarily interested in understanding the essence of President Trump's new line," a former Russian envoy told Newsweek.