The classified intelligence satellite, built by Northrop Grumman Corp., failed to separate from the second stage of the Falcon 9 rocket and is assumed to have broken up or plunged into the sea, said the two officials, who spoke on condition of anonymity.
The presumed loss of the satellite was first reported by The Wall Street Journal.
Northrop Grumman built the multibillion-dollar satellite, code-named Zuma, and was responsible for choosing the SpaceX Falcon 9 launch vehicle, both officials said.
An investigation is under way, but there is no initial indication of sabotage or other interference, they said.
SpaceX spokesman James Gleeson said: “We do not comment on missions of this nature; but as of right now reviews of the data indicate Falcon 9 performed nominally.”
Space Exploration Technologies Corp., or SpaceX, led by entrepreneur Elon Musk, launched its first satellite for the U.S. military with its Falcon 9 rocket in May 2017
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