An internal Pentagon nuclear study confirms Russia is developing an intercontinental-range nuclear-armed underwater drone.
The autonomous torpedo is among an array of new strategic weapons being developed by Moscow as part of a nuclear modernization underway over the past decade.
Russian nuclear modernization includes multiple upgrades for older missiles, launchers, bombers, and submarines, according to an internal draft of the Nuclear Posture Review, a major policy study to be made public in final form later this month.
The draft was published last week by the Huffington Post and labeled "unclassified/for official use only" and "pre-decisional."
The report states that the new strategic arms are in addition to the modernization of legacy Soviet weapons, and "multiple upgrades" for all legs of Russian nuclear forces including strategic bombers, sea-based missiles, and land-based missiles.
"Russia is also developing at least two new intercontinental range systems, a hypersonic glide vehicle, and a new intercontinental, nuclear-armed, undersea autonomous torpedo," the report says.