Three videos just uploaded show the small nuclear blast below. Nothing more is known at this time, including who launched the weapon or against which target.
The materials appear to have originated from the war-torn region of Ukraine, where separatists are attempting to return control of the former Soviet nation to Russia.
The attack comes after Britain’s defense minister voiced concerns Russia may have “lowered the threshold” for using nuclear weapons.
In their criticisms, Britain warned Russia’s nuclear strategy was being integrated with conventional forces in “a rather threatening way.”
Russia’s new military doctrine reserves the right to use nuclear weapons in a conventional attack that endangers the state’s existence, but some in the military were reportedly calling for a “first strike option.”