A Russian invasion of Ukraine could happen at any moment, a defence minister has warned.

Armed Forces Minister James Heappey has described the massing of roughly 130,000 Russian troops along the Ukrainian border as a "credible force set to do something imminently".  It comes after Defence Secretary Ben Wallace compared diplomatic efforts to prevent a Russian invasion of Ukraine to appeasement as he said it is "highly likely" Vladimir Putin will order an attack despite the concerted talks to avert war.

The UK Defence Secretary said there were individuals already in Ukraine "linked to the Russian state in ways that are not conventional".

Russia may already have personnel in place in Ukraine to assist with an invasion, the UK Government believes. Defence Secretary Ben Wallace told MPs there were individuals already in Ukraine "linked to the Russian state in ways that are not conventional" and "that should give cause for concern". He added: "We are becoming aware of a significant number of individuals that are assessed to be associated with Russian military advance force operations that currently are located in Ukraine."

It comes as concerns over a potential Russian invasion into Ukraine continue to increase. Moscow has massed an estimated 100,000 troops near the border with Ukraine. Mr Wallace told the Commons Foreign Affairs Committee that any incursion into Ukrainian territory would be unacceptable. He said: "Any crossing into Ukraine, whether small or large, would be viewed as a breach of that sovereignty, against international law and an invasion. "You can't be half-pregnant, you are either invading a country or you are not."