Archeologists have uncovered a 600-year-old, large underground cemetery belonging to a Peruvian warrior culture, thought to be the first discovery of its kind, an official said on Thursday.

After a tip-off from a farmer in Peru's northern Amazon jungle, archeologists from Peru's National Culture Institute last week found the 820-feet-(250-meter)deep cave that was used for burial and worship by the Chachapoyas tribe.