The robbery happened at about 2:15 p.m. at the HSBC Bank (7637 Old Georgetown Rd.), a block from the Bethesda Metro station.
Police said the suspect passed a note to the teller demanding money and implying a weapon. The man got an undisclosed amount of cash and left the bank. He was last seen walking north on Old Georgetown Road, away from the Metro station.
Police described the suspect as black, 30 to 40 years of age, 5-foot-7 to 6-feet tall, 190 to 200 pounds with facial hair. He wore a black jacket, brown wool cap, dark-colored scarf and sunglasses.
Detectives are asking anyone with information about this robbery to call Crime Solvers of Montgomery County toll-free at 1-866-411-TIPS (8477) or leave a Crime Solvers tip here. Crime Solvers will pay a cash reward of up to $10,000 for information provided to them that leads to an arrest and/or indictment for this felony crime. Tipsters will remain anonymous.