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STORY: 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 U.S. official told Reuters.

"The United States is deeply concerned about reports on the humanitarian conditions in Nagorno-Karabakh and calls for unimpeded access for international humanitarian organizations and commercial traffic," the official said.