Add Yahoo as a preferred source to see more of our stories on Google. Ukraine said Monday that it carried out an underwater drone attack on a Russian submarine in port. New satellite imagery shows ...

At its current production rates, China is likely to have a far more menacing submarine force than Russia in short order—though its quality is still uncertain.

More uncertainty can push Russia to a higher alert, deploying more tactical and strategic nuclear warheads onboard submarines sailing out from the Kola Peninsula.

In Europe's high north, America's NATO allies are practicing hunting for Russian submarines, with Norway, Spain, Germany and ...

A Russian submarine was deployed alongside a spy ship to map critical undersea infrastructure around Britain, it has emerged. An anti-submarine Merlin Mk2 helicopter could be seen from the photo ...