Intelligence suggesting new nuclear cooperation between Iran and Russia adds to concerns over Tehran’s rising uranium stockpile

Britain and the US fear Russia may have shared nuclear secrets with Iran in exchange for missiles to use in its war against Ukraine.

Iran's President Masoud Pezeshkian said on Monday that his government had not transferred any weapons to Russia since it took office in August, after Western powers accused Tehran of delivering ballistic missiles to Moscow in September.

The US and UK are increasingly concerned that Russia is sharing with Iran secret information and technology that could bring it closer to being able to build nuclear weapons, in exchange for Tehran providing Moscow with ballistic missiles for its war in Ukraine.

Russia's top security official Sergei Shoigu traveled to Iran less than a week after he met with North Korea's Kim Jong Un amid U.S. concerns that Russia is expanding its nuclear ties with adversaries.

Iran's supreme leader, the 85-year-old Ayatollah Ali Khamenei, has opened the door to possible negotiations by earlier telling its civilian government there was “no harm” in e