Two people were arrested Monday on charges that they vandalized a memorial dedicated to slaves and African-American workers at the University of North Carolina at Chapel Hill, the university police said.

The suspects, Nancy Rushton McCorkle, 50, and Ryan Francis Barnett, 31, face misdemeanor charges of vandalism and ethnic intimidation. Mr. Barnett also faces a misdemeanor charge of public urination.

Efforts on Monday evening to reach Ms. McCorkle and Mr. Barnett by phone and through email were unsuccessful. The university police said they identified the suspects through video surveillance footage.

The Unsung Founders Memorial was defaced with racial slurs and urine on March 31, and at least one of the vandals had ties to a group called Heirs to the Confederacy, the university said.