The photos were taken at the Collahuasi copper mine, more than 14,000 feet above sea level in the Andean plateau in the far north of Chile. An extremely remote location with low oxygen levels and unusually clear skies, the area is desolate and inhospitable. The Collahuasi mine produces copper concentrate, copper cathodes and molybdenum concentrate from three open-pit mineral deposits.
Four technicians - professionals specializing in electricity, electronics, and fluid control - were working there in April, 2013. They witnessed a disc-shaped object which approached slowly and was present for more than an hour, moving around in different positions and hovering at about 2000 feet. One technician took pictures with his Kenox Samsung S860 camera. The strange object made no sound, and eventually moved away towards the East.

The report states that the witnesses described the phenomenon as "a flattened disc, of brilliant color, with a diameter of 5 to 10 meters [16 to 32 feet]. It performed ascending, descending and horizontal movements in short lengths, about 600 meters above the ground." The witnesses had the impression that the object was under intelligent control.

The study concludes that "It is an object or phenomenon of great interest, and it can be qualified as a UFO."