MINNEAPOLIS - Minneapolis police and the FBI are asking for the public's help in identifying a serial bank robber.

Authorities say the man has robbed two TCF Bank locations and a U.S. Bank in Minneapolis in less than a week, starting Feb. 12.

Police say in each of the robberies, the robber implied he had a gun, but a weapon was not seen.

The suspect is described as a white man with a mustache, 26 to 30 years old, of medium build and standing 5-feet-6 to 6 feet tall.