U.S. Secretary of State Antony Blinken and Defense Secretary Lloyd Austin met with Ukraine's President Volodymyr Zelensky in Kyiv late Sunday, according to AP.

Why it matters: This is the first time top U.S. officials have traveled to Ukraine since the unprovoked Russian incursion began.

State of play: The meeting comes just days after the Biden administration unveiled another $800 million in military aid for Ukraine, including heavy artillery. The announcement brought the total U.S. military aid to the country since Russia's invasion to around $3.4 billion.

• Ukrainian lawmaker Yevheniya Kravchuk told ABC’s “This Week With George Stephanopoulos” that the visit sends “a powerful signal to Russia that Ukraine will not be left alone with this war.”
• United Nations Secretary-General António Guterres will be visiting with Zelensky and Russian President Vladimir Putin separately this week, the UN announced Friday.

Editor's note: This is a developing story. Please check back for updates.