Moscow's defense chief says soldiers will later return for another drill, following largest military buildup near the border since 2014 annexation of Crimea

Prison service insists Kremlin critic's condition is 'satisfactory,' despite outcry over his deteriorating health

European Union estimates Russia has 150,000 soldiers at frontier, says it will hold Moscow responsible for fate of imprisoned opposition leader Navalny, but won't use sanctions

Moscow claims Ukrainian envoy caught 'red-handed' trying to obtain sensitive information; Kyiv protests 'illegal' detention, responds in kind

Kyiv, West worried about Russian military buildup near border, the highest since 2014; Moscow counters that it's free to deploy its forces on its territory

Foreign Office says actions include 'cyber intrusions, election interference, and military buildup in illegally annexed Crimea'; move comes as US expels 10 Russian diplomats

Kyiv's allies vow support as fears grow over massive Russian military buildup on border and an uptick in clashes with separatists

Reports say imminent move is response to alleged election interference and SolarWinds cyberattack; tensions rising amid Russia-Ukraine conflict

Recently fighting has intensified between Ukraine's army and pro-Russian separatists in the country's east, with signs of a Russian troop buildup in the region

US president holds first phone call with his Ukrainian counterpart Zelensky, as Kremlin warns of response if America sends troops