FBI agents reported witnessing a mysterious black triangular object hovering silently above a mountain ridge before suddenly accelerating at speeds comparable to a fighter jet, newly released documents reveal.
The 2026 sighting is among several incidents detailed in the newly released records examining unidentified anomalous phenomena (UAP), alongside decades-old military encounters and reports of mysterious creatures, unexplained lights and supposed portals at a Utah ranch.
One report from the FBI describes an encounter with a dark, nonreflective triangular object resembling a drone, with an estimated wingspan of 9 to 15 feet and no visible exhaust or conventional propulsion system.
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The agents reported seeing the object rise vertically above a ridgeline before accelerating into a canyon without making a sound.
A separate report from the Pentagon’s All-domain Anomaly Resolution Office (AARO), which investigates reports of unidentified anomalous phenomena, provides a more detailed account of the encounter.
The report describes a matte-black triangular object that climbed about 200 to 300 feet above a ridgeline, hovered for roughly 20 seconds and then appeared to accelerate almost instantly, disappearing into a canyon within two to three seconds.
The witnesses described an object with no visible engines, rotors, exhaust or other conventional aircraft features.
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Read the report here:
The agents also reported observing a uniform heat signature across the object’s surface through handheld thermal equipment, without the concentrated hot spots typically associated with propulsion systems.
The Pentagon report notes that the object’s speed was estimated by witnesses rather than measured by instruments.
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The two reports differ on the length of the encounter. The FBI described a sighting lasting approximately three seconds, while AARO detailed about 10 seconds of vertical ascent, 20 seconds of hovering and another two to three seconds of rapid flight before the object disappeared.
Neither report identifies the object or establishes its origin.
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