Kimberlee Moran, the director of forensics at Rutgers University-Camden, says the bones of about 12 people can't be located.
In February, construction crews working on a 10-story apartment building in the city's historic district started unearthing coffins and fully intact human remains.
That's when owner PMC Properties contacted archaeologists.
The site was a burial ground that dates to 1707. All the remains were supposedly exhumed in the 1800s and moved to a different cemetery, but that apparently didn't happen.
Researchers at Rutgers University-Camden removed the remains and are studying them before they're re-interred.
Jonathan Stavin, executive vice president of PMC, says locations where bones were stored are being checked again.
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