DENVER -- The FBI and Denver police are asking for the public's help in finding a man who robbed a bank Monday afternoon.

Police said the man walked into the Key Bank on Speer Boulevard and demanded money from the teller.

The man ran away with an undisclosed amount of cash, said Detective Sharon D. Hahn of the Denver Police Department.

The robber is described as a white man in his 20s, between 5 feet 10 inches and 6 feet tall. He is about 170 pounds. The robber was wearing a hooded coat or a sweater with gray and white stripes. He also had a gray bandana underneath a tan visor, a white T-shirt and black pants, Hahn said.

Anyone with information is asked to call Crime Stoppers at 720-913-7867.