The suspect entered the bank, located on the 2500 block of Tobacco Road, at about 12:16 p.m. and demanded cash from the teller, according to sheriffs Investigator Glenn Rahn.
The man was wearing a gray sweatsuit and a mask over his face, Investigator Rahn said. He fled on foot.
He was last seen in the parking lot headed westbound on foot, Investigator Rahn said.
The incident and description of the robber compares to a robbery at the CSRA Federal Credit Union on Wheeler Road in February, so police believe he could be the suspect in both robberies, said Richmond County Sheriffs Sgt. Calvin Chew.
Anyone with information can call the Richmond County Sheriffs Criminal Investigation Department at (706) 821-1020.