(NewsNation) — As Mexico’s Congress held its first hearing on UFOs, a self-proclaimed ufologist unveiled what he claimed were alien corpses from Peru.

Jaime Maussan, who has previously been connected to alien claims that were later proven false, testified under oath that he believed the bodies were not terrestrial in origin. In his testimony, he said the Autonomous National University of Mexico had examined the bodies and found unknown DNA. He also said X-rays showed there were eggs inside them.

The two mummified corpses were discovered in Peru in 2017. They appear to have elongated heads and only three fingers and are estimated to be between 700 and 1,800 years old.

It’s not the first time Maussan has been connected to such claims, however, earlier claims from him were later determined to be false. In 2015, he unveiled what was purported to be an alien body. However, the mummy was later found to be that of a child with a head deformity.

Archaeologists believe the elongated skulls on some Peruvian mummies are the result of intentional skeletal modification, which would have been practiced by wrapping babies’ heads in rope, cloths and wooden boards. The practice was possibly part of religious practice.

Mexico is not the only country interested in unexplained phenomena. The U.S. recently held a congressional hearing on UFOs, and some of the witnesses were also present at Mexico’s hearing.

Harvard astronomy professor Avi Loeb, appearing by video, called on Maussan to allow international scientists to perform further research on the mummies.