The United Kingdom has accused Russia of plotting a conspiracy to inflict a pro-Moscow government in Ukraine.
In a statement, Foreign Secretary Liz Truss said that the latest information reflects the extent of Russian activity aimed at subverting Ukraine.
He urged Russia to de-escalate, end its campaigns of aggression and pursue a path of diplomacy.
Similarly, Britain's deputy Prime Minister Dominic Raab also warned Russia to face severe economic sanctions if it installs a puppet regime in Ukraine.
However, in a tweet, Russian Ministry of Foreign Affairs has denied the allegations.