The U.S. Embassy in Ukraine team has done a heroic and tireless job supporting Ukraine, U.S. Secretary of State Antony Blinken, who met with U.S. diplomats, has said.

"So appreciated visiting with our U.S. Embassy in Kyiv team today. They have done heroic and tireless work supporting Ukraine providing critical assistance to American citizens departing Ukraine. We are all incredibly proud of them," Blinken wrote in Twitter on Sunday.

In addition, Blinken said that the United States called on U.S. citizens to immediately leave the territory of the Russian Federation, since the United States' ability to provide assistance if necessary is limited.