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.
“She said she then saw six objects hovering side-by-side; close enough to see that each object had two rows of windows. She described them as being ‘two-story.’
“She said that they were so bright and that a foggy sort of light was beaming down from underneath each object.”
The woman attempted to photograph what she was seeing.
The report added: “She frantically reached for her cell phone in time to snap a couple of photos.
“I, myself, have seen some pretty amazing things in the sky that I can only describe as being extraterrestrial, and she was the biggest sceptic until she saw for herself.
“She was so excited to share this with me. She is not one to exaggerate or seek attention in anyway. She’s a no BS kind of lady. I know what she saw was genuine. She asked that I share with the UFO community.”
Three images were included with the MUFON report about the April 2017 incident.
Roger Marsh, MUFON director of communications, said: “Please be very cautious with UFO photography before investigation analysis is completed.
“The witness report indicates the objects were a disc shape less than 100 feet away.
“Please remember that most UFO sightings can be explained as something natural or man-made.”
MUFON Arizona Field Investigator Kristine Wulf is looking into the claims.
Scott Brando, a separate UFO investigator, who runs the debunking website ufoofinterest.org, believes the object in the picture was just a lensflare.
This is when lights refracts inside the camera and then gets projected onto the image – so nothing is actually there.
He provided a picture to Express.co.uk of an almost identical “UFO” which he says has been confirmed as being caused by a lensflare caused by light from a street lamp.