The locations of more than 200 possible unmarked graves have been found in Woodland Cemetery next to Memorial Stadium on the Clemson University campus.
The graves were found by ground-penetrating radar and are believed to date back more than a century, according to a release from the university.
"The graves are thought to be those of enslaved people who worked from about 1830 to 1865 on John C. Calhoun’s Fort Hill Plantation and later as sharecroppers and Black laborers, including convicted individuals involved in the construction of Clemson College from 1890 to 1915," the release said.
All are believed to be African Americans, the release said.