Senior Biden administration officials were to arrive in Armenia on Monday, a U.S. official told Reuters, after ethnic Armenians in Nagorno-Karabakh began a mass exodus on Sunday following Azerbaijan's defeat of the breakaway region's fighters in a conflict dating from the Soviet era. The visit by U.S. Agency for International Development chief Samantha Power and U.S. State Department Acting Assistant Secretary for Europe and Eurasian Affairs Yuri Kim would be the first by senior U.S. officials to Armenia since a ceasefire last week. Power will meet with senior government officials and will "affirm U.S. support for Armenia’s democracy, sovereignty, independence, and territorial integrity and commitment to address humanitarian needs stemming from Nagorno-Karabakh," the official said.