The Flagstar Bank at 35238 Woodward Ave. was robbed the morning of Dec. 20, according to Birmingham police.
The suspect entered the bank at about 9:35 a.m. without a visible weapon.
The suspect, who fled the scene on foot, is described as a white man, 5 feet 7 inches tall, 160 pounds, and wearing a dark-colored jacket, blue jeans and a brown baseball cap. Police believe he may be connected with other bank robberies in Birmingham, Ferndale and Clinton Township.
Birmingham police are working with the FBI on the investigation.