U.S. ambassador to Ukraine Bridget Brink intends to resign from her post early, three sources told CBS News.
The State Department confirmed her intent to step down Thursday afternoon.
"Ambassador Brink is stepping down. She's been the ambassador there for three years – that's a long time in a war zone. And frankly, the war has gone on for far too long," a State Department spokesperson said in a statement. "The real issue is whether the Russians and Ukrainians are ready to do what's necessary to end this war."
Brink has not formally submitted resignation papers but she has been making farewell calls to colleagues, sources said.
Ambassador Brink has not responded to a request for comment.