"Great Concern": US "Aware" Of Possible Russian Troop Buildup Near Ukraine

Russia- Ukraine Conflict: US officials are concerned over unexplained movements of Russian military units in the area, reports said.

The Pentagon is monitoring the Ukraine region closely amid reports of a new buildup of Russian troops on the country's border, Pentagon spokesman John Kirby said Monday.

According to The Washington Post, US officials are concerned over unexplained movements of Russian military units in the area.

Videos posted on social media show military trains and truck convoys moving tanks and missiles in Russia's southwest near Ukraine.

A US official, speaking on the basis of anonymity, confirmed that there had been some movement, though not as large as the surge in Moscow's forces early this year.