The FBI and the Loudoun County Sheriff's Office are seeking information about a bank robbery that took place in the Sterling area last week.

Shortly after 11 a.m. Thursday, the robber entered the Bank of America branch located at 45985 Regal Plaza and passed the teller a note. In the note, the man demanded money and signaled that he would shoot a firearm. However, he did not show a weapon, authorities said.

The robber then received an undisclosed amount of money, and he left the bank on foot.

The culprit is described as a black man in his mid-20s who is about 6 feet tall and has a thin build.

He was wearing a black jacket, a black collared shirt, a black undershirt and sunglasses. He also had a black glove on his right hand but not on his left one. And he sported a black 686 brand knit snowboarding cap.

"This hat is distinct and easily recognizable. If the public sees someone who fits the robber's description, we ask them to contact law enforcement," said FBI spokeswoman Lindsay Godwin.

Anyone with information can call the FBI at 202-278-2000 or Loudoun Crime Solvers at 703-777-1919.