Three arrests have been made and authorities are looking for a fourth suspect in connection with a Sandy Springs armed bank robbery, the FBI said Monday.

The Wells Fargo in the 6300 block of Roswell Road was hit Aug. 30. Authorities said two men with handguns entered the bank around 9 a.m., and at least one jumped over the counter. The suspects left with an undetermined amount of money. No one was injured in the incident.

One day after the crime, Atlanta police arrested two suspects after they spotted a 2010 Ford Focus traveling in the wrong direction in the 600 block of Spring Street.

Shamir Guillaume, 20, of Atlanta and Sean Theodis, 26, of Virginia were taken into custody after the “routine traffic stop escalated into a more in-depth investigation” of Guillaume, and the vehicle was searched, the FBI said in the news release. Both men were charged with bank robbery.

Saturday, Sandy Springs police apprehended 22-year-old Rhakeem Butler of the Washington, D.C., area. He is charged with bank robbery and use of a weapon in furtherance of a crime of violence.

The fourth suspect, Kelvin Purdic, also known by the last name Purdy, is still at large, authorities said. The 24-year-old North Carolina man faces conspiracy-related charges. He is described as a black male standing 6 feet 3 inches tall, weighing 175 pounds and with a slender build.

Authorities said he has been known to frequent the Peachtree Dunwoody area of metro Atlanta.

Anyone with information on his whereabouts should contact the FBI’s Atlanta office at 404-679-9000.