Unidentified flying objects have baffled the intelligence community in recent years and could pose a threat to national security, according to a government report Friday that did not rule out an extraterrestrial origin for the phenomena.

The Office of the Director of National Intelligence warned in a report that if the unidentified aerial phenomena (UAP) were collecting information for a foreign adversary, it could pose a “national security challenge.”

But regardless of whether the objects — some of which broke the sound barrier with no sonic boom, disappeared into underwater, hovered in mid-air — came from a foreign power or a more advanced race of beings from outer space, the threat cannot be ignored, according to Christopher Mellon, a former deputy assistant secretary of Defense for Intelligence.

“We can no longer deny that someone has mastered technology beyond our understanding and is using it to monitor U.S. military forces and probably much else,” Mellon said.

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