Police are searching for the gunman who robbed a Regions Bank in Columbia late Wednesday morning. Police reported the suspect demanded money and threatened a teller with a handgun upon entering the bank on Carmack Boulevard just after 10 a.m. The suspect is described as a black male with a medium build and is around five feet, nine inches tall and weighs 180 pounds.At the time of the crime he was wearing a hat, a red bandanna to cover his face and a black jacket. Police said the suspect should be considered armed and dangerous. Anyone with information on the crime is urged to call police at 931-380-2930 or the FBI tips line at 615-232-7500.