The 500-year-old site contains 24 mummified corpses and is the biggest burial ever found in the coastal region of Lambayeque, in northwest Peru.
The corpses — four of which are believed to be Inca nobility — are buried alongside funerary offerings such as ceramics, grains and high-quality clothes, Daily Mail wrote.
These fine fabrics and ceramics would not have been found in the burial site of poor people, experts said.
From their ancient capital Cusco, the Incas controlled a vast empire known as Tahuantinsuyo, which extended from the west of present-day Argentina to southern Colombia.
This ancient civilization ruled for more than two hundred years before being conquered by the invading Spanish in the 16th century. However, little was known about their presence in the famous Valley of the Pyramids until now.
The corpses were found in Huaca Las Abejas in a 221-hectare large pyramid city called Túcume, which is home to 26 pyramids.
The burial was found around one kilometer from the main pyramid, the Huaca Larga, which towers at 30-meters (100 feet) high — one of the tallest in South America.
A team of 89 archeologists led by Túcume Site Museum have been examining the Inca tombs and now believe the ancient civilization arrived in the area in 1470.
The fact members of the Inca nobility were being buried at the site suggests this ancient civilization was well-established in the region.
"We have all the evidence that it is an elite group of both men and women," said the director of the Túcume Museum, Bernarda Delgado.
Archeologists are yet to confirm the gender of each individual but they believe it is women who were buried alongside tools for weaving.
Meanwhile, they believe the male corpses are those surrounded by oars, wooden paddles and shells.
Three or four individuals are wrapped in bundles of up to thirty different fine fabrics and are believed to be Inca nobility.
It is unknown why the Inca nobility was buried in the region and archeologists believe there are at least 10 more corpses to be uncovered.
Some ceramics are also still intact, giving us insight into Inca pottery at the time, wrote Spanish site La Vanguardia.
"Eight million soles ($2.4 million) were allocated for research, conservation and restoration projects in this archaeological complex, of which from 2017 to date, two million soles have been used (about $607,810)," said Luis Villacorta the vice minister of Cultural Heritage.