Many European countries are accusing Russia of sabotage after the cutting of two communication cables under the Baltic Sea.
One of the cables links Finland and Germany, while the other connects Sweden to Lithuania.
It comes as Ukraine's fired its first set of US-made long range missiles into Russia.
While Russia shot down five of them, the shrapnel from a sixth caused a fire at a military facility in the Bryansk region.
Europe correspondent Gavin Grey told Ryan Bridge other moves inside Russia are increasing concern in Europe.
He says Russia has changed its rules around when it can use a nuclear weapon.
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