A video uploaded to popular conspiracy channel, SecureTeam10, on YouTube shows the strange disc which was unearthed by the Russian miners.
The team, who were part of the Kuzbassrazrezugol mining company, were mining in the remote region of Volgograd when they found the ‘UFOs’ some 40 metres underground.
The disc is around 1.2 metres in diameter and weighs roughly 440 lbs – or 31 stone.
The narrator of the video claims that the object was “found to have been coated in a metal known as tungsten … this is a metal that has typically been used in technology that belongs to the military”
“Tungsten has one of the highest melting points and is commonly used in things that are put up in space due to the fact that they can withstand the extremely high temperatures that occur when an object enters the atmosphere.”
The narrator of the video says that theories are spreading that “these objects actually hold the remains of extra-terrestrial beings.
“They obviously look artificial, they’re all in the shape of a flying saucer … not to mention the fact they were found deep underground in a mine.”
Excavator Boris Glazkov, who found the object, said: “I have to say it wasn’t hard to see as it was really distinctive and large.
“I’ve never seen anything like this object, which is obviously man-made, out here in the middle of nowhere before. It is a real mystery.”
His colleague, Arthur Presnyakov, added: “There were actually two similar objects, but the first one broke as it was being pulled out of the ground by the excavator bucket.
“We thought we saw something sure, because it broke into pieces, but then when the second one appeared we stopped work and carefully removed it from the bucket.”
However, commenters on the video were not as convinced.
One person wrote: “Looks like a type of a mill stone.”
Another said: “How could anyone possibly think that is a UFO just because they are saucer shaped.”