Doctors at a laboratory in Mexico City carried out X-rays and CT scans of the bodies on Tuesday. José de Jesús Zalce Benitez, the director of the Health Sciences Research Institute of the Secretary of the Navy, which carried out the tests, said they showed the bodies had not been assembled or manipulated. That contradicted earlier suggestions that the bodies had been assembled with animal or human bones.

“[They] belong to a single skeleton that has not been joined to other pieces,” he said.

Footage of the team carrying out the tests shows one of the bodies bearing an elongated head, two slanted eyes and a small upturned nose. While it bears a resemblance to fictional depictions of aliens, scientists have yet to suggest that they are indeed from another planet.

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