Traveling by train through Apache County in the Arizona desert, the witness allegedly saw "six hovering, two-story objects beaming light to the ground level".
A child of the woman who reported the astonishing sight filed the account to the US-based Mutual UFO Network (MUFON), the world's biggest organisation dedicated to alien research and investigation.
The report said: "My mother was traveling through the Arizona desert via train, on her way to Texas.
“She was unable to sleep due to movement of the train. She said she was looking out of the cabin window and saw a very bright light that became brighter as the train approached.
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