Russia is a sending an unspecified number of troops from the country’s far east to Belarus for major war games, officials said Tuesday, a deployment that will further beef up Russian military presence near Ukraine amid Western fears of a planned invasion.

Amid the soaring tensions, the White House warned that Russia could attack its neighbor at “any point,” while the U.K. delivered a batch of anti-tank weapons to Ukraine.

Russia’s Deputy Defense Minister Alexander Fomin said the joint drills with Belarus would involve practicing a joint response to external threats.

Ukrainian officials have warned that Russia could launch an attack on Ukraine from several directions, including from its ally Belarus.