The FBI is looking for a note-carrying bandit believed responsible for four robberies and one attempted robbery along the Crain Highway corridor in Glen Burnie during a six-week period this summer.
The man also may be responsible for a fifth bank robbery in Millersville, the FBI said.
The Maryland Association for Bank Security, a professional group of bank security officers, law enforcement officers and the FBI, is offering a reward of up to $2,000 for information leading to the arrest of the robber.
"When we have a robbery spree that's believed to be perpetrated by the same suspect, we think there's quite possibly someone out there who knows about it and might be able to help us out," said FBI Agent Melvin L. Fleming, a supervisor of bank robbery investigations.
The five robberies, from July 19 to Tuesday, account for more than 20 percent of the bank robberies in the county this year, the FBI said.
The bandit used the same method in all the robberies and never has displayed a weapon, police said.
The first robbery in the series occurred at 2:20 p.m. July 19 at Arundel Federal Savings bank in the 600 block of Crain Highway.
The next attempt 10 days later at the Signet Bank in the 500 block of Crain Highway ended in failure.
Police said a man walked in the bank about noon and handed the teller a note demanding "all the banded fives and tens." The teller said she did not have any and told the man to leave. He took his note and left.
The next two robberies occurred Aug. 1 and Aug. 4, at the NationsBank in the 300 block of Hospital Drive, and then the First National Bank of Maryland in the 7500 block of Ritchie Highway.
On Tuesday, a man, thought to be the same suspect, walked into the Provident bank in the 7400 block of Ritchie Highway about 2:30 p.m., stopped at a counter, then walked to a teller station and handed the employee a note and a money envelope.
The note told the teller to give him money and no one would get hurt, police said. The teller complied, and the man ran out.
The FBI said the bandit might also be the man who held up another First National Bank -- this one a few miles away in the 400 block of Old Mill Road in Millersville -- shortly before 4 p.m. Aug. 9.
Mr. Fleming said it is not unusual for a robber who is not caught immediately to strike again, but "it piques our interest when we seem to have the same person who's that repetitive and keeps going."
Association President James Youngblood said he hopes "someone in the community will recognize the suspect and come forward to help us find him."
The man was described as black, light-skinned, in his late 20s or early 30s with a thin build. He is about 5 feet 10, weighs about 160 pounds and has a slight mustache and beard.
In the robbery Tuesday, the robber was wearing a short-sleeved, yellow-striped Nike shirt with matching striped Nike shorts, high-top basketball shoes and a black Pittsburgh Pirates baseball cap with a gold letter P on the front. In other robberies, the man was carrying a black or navy backpack over his shoulder.
Officials declined to give any information on the amounts taken.
Anyone with information should contact the FBI in Annapolis at 224-3344, or in Baltimore at 265-8080, or the county police at 222-3566.
Callers can remain anonymous.