Russia's troop build-up near Ukraine is growing, not shrinking, warns West

There is a growing Russian military presence at Ukraine's borders, Western countries warned on Wednesday, as Estonia said battle groups were moving ahead of a likely attack to occupy "key terrain," contradicting Moscow's insistence of a pullback.

More armored vehicles, helicopters and a field hospital have been spotted, Britain's defense intelligence chief said in rare public comments.

Up to 7,000 more troops have moved to the border in recent days, including some arriving on Wednesday, a senior official in U.S. President Joe Biden's administration said, without providing evidence.

World powers are engaged in one of the deepest crises in East-West relations for decades,