There has been ongoing conflict between the two nations since Russia’s annexation of Crimea from Ukraine in 2014. Skirmishes have been taking place between Ukrainian troops and pro-Russian separatists in Donbass.
The ongoing fighting, mixed with periods of cease-fire, is believed to have killed around 14,000 people.
Last week, Ukraine reported that four of its soldiers had been killed due to shelling by Russia forces in Donbass.
Earlier this month, Ruslan Khomchak, commander-in-chief of the armed forces of Ukraine, claimed that Russia’s “armed aggression” in the region was a “major threat” to both Ukraine and all NATO allies.
Mr Khomchak added earlier this week that there has been an increase of Russian troops near the border.
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“We really don’t want to see that.”
When asked to clarify, he added: “I mean a civil war, which there already was there.”
Ukraine’s President Volodymyr Zelenskyy said the escalation of tensions showed that Russia was seeking to create a “threatening atmosphere”.
Kyiv hopes to resume a ceasefire that it negotiated last year.
In a statement on Thursday, President Zelenskyy said: “Muscle-flexing in the form of military exercises and possible provocations along the border is a traditional Russian affair.”