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STORY: "We will continue to work with allies and partners to bring even more pressure on Russia and the individuals and entities that are helping support its attempted land grab," State Department spokesperson Ned Price told reporters.

"You can expect additional measures from us in the coming days."

White House spokesperson Karine Jean-Pierre said the measures would include penalties on individuals and entities both inside and outside of Russia that support the annexation.

Moscow was poised on Wednesday to annex a swath of Ukraine, releasing what it called vote tallies showing support in four partially occupied provinces to join Russia, after what Kyiv and the West denounced as illegal sham referendums held at gunpoint.