SAN FRANCISCO (AP) — A report finds that a majority of the oldest artifacts part of the permanent collection of the Mexican Museum in San Francisco are either forgeries or not up to national museum standards.

The report concludes that only 83 of the 2,000 artifacts from the museum’s pre-Hispanic or pre-Columbian era could be authenticated.

READ MORE: San Jose Police Release Video Of Suspect's Car In 2018 Khan Lieu Cold Case Murder

The museum board told the San Francisco Chronicle that it was shocked by the low number. This is the first in a series of authentication studies done on the museum’s more than 16,000 artifacts, so the number of forged pieces is expected to climb.

READ MORE: COVID Vaccine: San Francisco Employers Join Chorus Of Pressure On The Unvaccinated

The $80,000 report was conducted as a Smithsonian Institution requirement. The Mexican Museum was accepted as a Smithsonian affiliate in 2012, raising the bar on the quality of artifacts that can be displayed.

MORE NEWS: Child Tax Credit: Monday Is Deadline To Opt Out Of Advance Monthly Payments

© Copyright 2017 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.