"I don't have any independent corroboration of that," State Department spokeswoman Marie Harf told reporters at a regular news briefing, hours after Malaysian Prime Minister Najib Razak announced the jet's crash at a press conference citing new analysis of satellite data. "I have no reason to believe it's not true. I just don't have any update for you," Harf said, adding Washington was working " very closely" with the Malaysian government.
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