The Federal

Bureau of Investigation is looking for a man who fired his pistol to take

over a Riverdale branch bank Monday morning during a robbery, causing

customers to dive for cover.

The robber

stormed the Bank of America branch at 2225 Ga. Highway 138 in Riverdale,

just across the Fayette County line Monday at 10:15 a.m., FBI officials

said. The suspect fired a shot into the ceiling and ordered everyone in

the bank to the floor, police said.

The robber,

who was wearing a dark mask and sweat pants, vaulted over the teller counter

and went to an unoccupied teller position but found no cash, according

to a news release from the Atlanta office of the FBI. "He then went

to another, and possible two other, teller positions where he grabbed

an undisclosed amount of cash before fleeing on foot," the FBI said.

The entire

heist took less than 30 seconds and no one was hurt, according to the

FBI. The suspect is described as a thin black male in his 20s.

Investigators

recovered a single spent 9mm shell casing at the scene, officials said.

The bank is

located about a half-mile east of the intersection of Ga. highways 279

and 138 on the northern border of Fayette County and just inside Clayton

County. The robbery location is within one mile of Our Lady of Mercy Catholic

High School.

Anyeone with

information about the robbery is asked to call the Atlanta Field Office

of the FBI at 404-679-9000. A reward is offered.