YULEE, Fla. -- Deputies in Nassau County might have a serial bank robber on their hands after a Yulee bank branch was held up at gunpoint Friday afternoon for the second time in as many months, authorities said.

An unidentified gunman robbed the Southeastern Bank, located at 463128 State Road 200, about 2:30 p.m., getting away with some cash in an older model white car, Undersheriff George Lueders said. It happened exactly a month after someone robbed the same bank branch.

The undersheriff would not rule out the possibility that the same suspect is behind both robberies, adding that it could even be the same man responsible for recent robberies in Jacksonville.

"It could possibly be the same suspect. We could have a serial bank robber, but we're not sure," said Lueders, who acknowledged that there were some discrepancies between the two cases.

The suspect in Friday's robbery is described as a white, middle-aged man with tattoos on his neck and both hands, according to the Sheriff's Office. Deputies said he was carrying a black handgun, and wearing a gray and blue Florida Gators hat, a plaid shirt and blue jeans.

On April 22, a suspect wearing a plaid shirt, bandana and sunglasses -- and carrying a motorcycle helmet -- walked into the bank about 11:30 a.m. and handed tellers a note demanding cash before getting away, Capt. Greg Foster said.

Deputies said at the time, based on the description provider by tellers, he could be the same man behind a bank robbery in Kingsland, Ga., not too far from the Florida-Georgia border.

The preliminary pictures provided following both Yulee robberies are grainy. Investigators won't be able to confirm whether it's the same man until they get their hands on enhanced images from both cases, Lueders said.

Deputies are asking for your help identifying the suspect. If you recognize him, please call the Sheriff's Office at (904) 225-5174 or First Coast Crime Stoppers at (866) 845-TIPS.