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Russia Is Secretly Helping Iran Develop Supersonic Missiles

The covert program enlisted Russian missile specialists to help Tehran build ramjet propulsion for missiles that could threaten U.S. warships, the FT reported.

  • On Tuesday, a Financial Times investigation revealed a "multiyear covert programme, codenamed C430L," in which Russia is helping Iran develop supersonic cruise missiles with advanced ramjet propulsion technology.
  • Iran has pursued ramjet technology since at least 2019, when Supreme Leader Ali Khamenei inspected development sites; analysts describe the current cooperation as part of a broader exchange involving Iranian drones for Russia's war in Ukraine.
  • Russian specialists from the NPO Mashinostroyenia design bureau enlisted in the program are refining designs for missiles intended to threaten United States Navy aircraft carriers and other warships throughout the Middle East.
  • Despite ongoing conflict between Iran, the United States, and Israel, Russian support continued into 2026, requiring approval from the highest political echelons in Moscow.
  • Russia is attempting to "broaden the Ukraine war and draw the US into different theatres," said Nicole Grajewski, a professor at Sciences Po in Paris, enabling Tehran to master technology it has sought for decades.
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Tehran has already manufactured and tested several of these missiles, but does not know that it has deployed them so far.

·Madrid, Spain
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Russia is secretly helping Iran develop advanced hypersonic cruise missiles, in one of the most significant known transfers of strategic military technology between Moscow and Tehran, the Financial Times reports.

·Vilnius, Lithuania
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Jornal Expresso broke the news in Paço de Arcos, Portugal on Tuesday, September 1, 2026.
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