Mexican journalist Jamie Maussan made the announcement about the bodies, supposedly found in a tomb near the Nazca Lines in southern Peru, at the Ufology World Congress in Montserrat, Spain.
He said: “Tests were carried out to arrive at an extraordinary conclusion.
“30 per cent of this DNA is similar to the human being, but 70 percent is not.”
He said the new tests were carried out by the BioTecMol laboratory.
He added: “As it is the report of a laboratory says that surely they are of bacterial origin.
“However, in a more detailed analysis, it was found that only 20 per cent is of bacterial origin and 80 percent of that 70 per cent it was not possible to establish its origin or find another species on Earth that shares it.
“About 2,000,000 more sequences need to be determined.”
Mr Maussan played a video of biologist Ricardo Rangel discussing the findings.
Mr Rangel has been involved in testing a number of other suspected alien bodies that turned out to be hoaxes.
In the video, he said: “Of the four samples that have been studied, between 19 per cent and 30 per cent of similarities to the human genome have been identified.
“We are comparing with animals like primates, the crocodile, the sea turtle to see if there are similarities and the results is that so far with the database we have there is no similarity.
“We still have a lot more DNA to sequence which will take us at least six months to one year.”
Last month Express.co.uk revealed previous DNA test results on a three-fingered hand and some brain tissue carried out by scientists at Paleo DNA laboratory at Lakehead University, Ontario, Canada, had concluded they they were a 100 per cent match for human DNA.
Conspiracy theory website Gaia.com ran a series of videos which claimed the bodies could be a newly undiscovered species or even alien.
The bodies were carbon dated to between 245 to 410 AD, but genuine scientists believe they have been created to look like aliens using the “grave-robbed” mummified remains of anciently-buried humans.
The organisers of the ninth annual World Congress on Mummy Studies, which took place in Lima, Peru, last August, issued an angry call on Facebook for an official inquiry into whether archaeological crimes have been committed.
The congress brings together world experts in mummies and skeletons in a new location each year.
Under the heading ‘The Fraud of Extraterrestrial Mummies’, translated from Spanish, the congress said it believed real human mummified remains had been mutated and re-arranged to create bogus alien-looking creatures.
Commenting on the previous DNA results, British UFO investigator Nigel Watson said: “It shows it has a male human skull and hands. Another fake bites the dust.”
However, conspiracy theory website Exonews said about the recent DNA results: “The investigation must continue but there already is enough robust evidence in favour of the extraordinary.
“It could very well be the definitive evidence that we are not alone because there are visitors from other worlds who have lived with us in the past or who still interact with us or maybe there are intelligent non-human beings in underground bases.”