US weighs more troops for NATO allies as Ukraine tensions mount: media
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The possible deployment could involve 1,000 to 5,000 troops, along with naval vessels and aircraft, according to the New York Times.
It said the number could rise sharply if conditions deteriorate.
CNN said the Pentagon is identifying which units would go but that the final decision to deploy them has not been taken.
US officials, speaking anonymously, said that they are consulting with allies on deployments and studying all scenarios.
NATO said Monday it was sending jets and ships to bolster its eastern European flank. The United States, Britain and Australia has ordered diplomats' families to leave Kyiv.
The moves came after talks between Russia and the US-European side last week failed to bring about any significant breakthrough.