MOSCOW — Presidents Joe Biden and Vladimir Putin have begun their closely watched call on Ukraine as the U.S. warns that a Russian invasion of its neighbor may be imminent.
The White House says their call began Saturday at 11:04 a.m. EST. U.S. officials have warned anew that Russia's buildup of offensive air, land and sea firepower near Ukraine has reached the point where it could invade on short notice.
A State Department travel advisory on Saturday said most American staff at the Kyiv embassy have been ordered to leave and other U.S. citizens should depart the country immediately as well.
