The US government believes Russia could launch an invasion of Ukraine at any moment.
The White House press secretary warned of an “extremely dangerous situation” on the country’s border, where Russia has massed more than 100,000 troops.
Talks between the United States and Russian have failed to resolve the stand-off between the two countries and the US has warned Russia of “dire economic consequences” if it invades its neighbour.
Huw Edwards presents BBC News at Ten reporting by diplomatic correspondent James Landale.
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