An ally of President Vladimir Putin issued a stark new nuclear warning to Ukraine and the West on Tuesday as Russia began releasing results of referendums it bills as a prelude to it annexing four Ukrainian regions.
Moscow's latest broadside came as European countries rushed to investigate unexplained, major leaks in two Russian natural gas pipelines under the Baltic Sea that posed risks of explosions and the sinking of any ships that enter the area.
The Kremlin, which has blamed technical problems for earlier cuts in Russian gas supplies to Europe, said it could not rule out sabotage, without saying who was to blame.
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