In a more controversial claim, famous ufologist Jaime Maussan said that the experts have discovered rare metals and alloys in the chests of the "alien mummies"from Peru.
The ufologist said that mobile phone-like devices were in the bodies of the mysterious corpses.
According to the ufologist, these metals were most probably the interstellar communication devices.
Among those rare metals found, one was osmium which can prove lethal to humans. "I believe this is a device for communication. I don't really know how it works, but the experts will have to go in-depth to understand why they put this inside the body," said Maussan, as reported by The Mirror.
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"My guess is this was for health, to communicate something or a kind of cellular phone. The metal is made of osmium, which is used for telecommunications and satellites in the space field. It is very rare. It's not easy to find and it's very, very expensive and besides it's very toxic. For a human to have that inside them could create a big injury in the body or probably could kill the body," he added.
"So it's difficult to understand why they did it. If you are going to create a hoax like this, are you going to put a very rare metal inside?" said the ufologist.
The bodies are being currently tested by scientists. Maussan has claimed that they were first found in a cave in Nazca, Peru, in 2017.
It has also been claimed that these centuries-old bodies with elongated skulls have "30 per cent unknown" DNA.
Maussan has claimed that the bodily compounds found in the alien mummies suggest "the possibility that this is from somewhere else or was created by someone else."
Investigative filmmakers Serena DC and Michael Mazzola have joined Maussan in documenting the scientific investigations of these mummies.
Watch:Peru's 'Alien Mummies' under fresh scrutiny
"My initial takeaway from looking at these beings is that these bodies are a new species unknown to mankind previously. It is a major discovery for mankind," Michael said.
"It is completely bizarre to me that these discoveries have been ignored, dismissed and ridiculed; instead of being considered as the biggest story in theworldof science. People are always eager to invoke some kind of conspiracy theory to explain why some injustices have happened. But in my experience you do not need a conspiracy theory when human frailty or failure will do just fine," he added.
(With inputs from agencies)