Officers are at the scene of a bank robbery at the Associated Bank at 2420 Allen Blvd., according to the Middleton Police Department.
Police said man entered the Associated Bank at 8:44 a.m. on Wednesday. The man showed the teller a note that said he had a gun and was demanding money.
The gun was not displayed and no one was injured, police said.
The man left the area in a light gold-colored four-door sedan with no rear license plate.
The man is described as white, mid-20s, about 5 feet 8 inches tall, a medium to thin build with shaggy brown hair. He was wearing a dark baseball cap, a long-sleeve yellow shirt, dark sunglasses and tape over the bridge of his nose.
Police said the man looks similar to a man who robbed the same Associated Bank in September 2011.
The robber is described as a white man with shaggy brown hair and tape over his nose, police said. They said he left the bank in a tan or gold-colored four-door car.