Archaeologists have unearthed ancient skeletons believed to date back as far as 1,500 years during a dig in the Mexican town of Pozo de Ibarra.

The discovery, described as part of a "complex funerary system," was made as experts prepared a construction site for a sewage-related project, according to the National Institute of Anthropology and History (INAH).

At least seven intact skulls were found at the site, exhibiting signs of "cranial modification," possibly carried out for aesthetic purposes, as per the INAH.

The arrangement of the bones indicated a deliberate structure to the burial ground, suggesting a sophisticated funerary system.

"The funerary system consists of a primary burial, where the skeleton maintains its anatomical relationship, accompanied by a concentration of human bone remains deposited without anatomical relationship but with a specific arrangement," stated the INAH.

Certain bones, such as femurs, tibias, rays, and ulnae, typically longer bones, were strategically placed, while skulls were intentionally grouped together, with some stacked atop others, in a separate area of the site.

Although the age of the bones has yet to be confirmed, experts estimate they could be around 1,500 years old.

"The discovery is likely associated with the Amapa cultural phase (500-800/850 AD), as ceramic vessels and anthropomorphic figurines from that period were also recovered," noted the INAH in a release.

The significance of this find extends beyond its archaeological implications, showcasing a unique burial practice not previously documented in nearby sites. It serves to deepen our understanding of funerary customs in the region.

"This archaeological find is exceptional, as there are no precedents for this type of burial in other nearby sites, enriching our comprehension of funerary practices in the region," remarked the INAH. "Moreover, it fosters collaboration among various INAH entities for the protection, research, conservation, and promotion of heritage."