U.S. preparing to withdraw all personnel from Ukraine capital within 48 hours, sources say

The U.S. is preparing to withdraw all personnel from Kyiv in the next 24-48 hours, three sources confirmed to CBS News, amid continuing tensions with Russia along Ukraine's borders. 

The U.S. has already ordered all non-emergency employees to leave the U.S. embassy in Kyiv. The U.S. embassy tweeted Saturday morning that the "continued reports of a Russian build-up on the border with Ukraine indicated "potential for significant military action."

Consular services at the Kyiv embassy were set to be suspended Sunday.