Argentine archaeologists have discovered remains belonging to 50 Tehuelche Indians in the central region of La Pampa, it was reported on Monday.
Carbon-dating tests, conducted by experts from the United States, indicate that the remains are at least 500 years old, according to press reports here.
Researchers believe that the site where the remains were found, some 400 km from La Pampa's capita Santa Rosa, could have been used for human sacrifices, as many of the bones have arrowheads embedded in them.
The archaeological site belongs to Comodoro Rivadavia, a petrochemical company that found bones when earth movers began work on new construction.
The Tehuelches were nomads that hunted guanacos and nandu, a large flightless bird.
The finding will be preserved in the Carlos Gradin Cultural and Technical Center, a museum built in memory of a researcher who found 9,000-year-old indigenous people's bones in Argentina's Casa Piedra region.