Officers were called out to the Umpqua Bank at the corner of Esplanade and 6th Avenue just before 10 a.m. Wednesday morning. Police say a man wearing a grey hooded sweatshirt and mask reportedly entered the bank and demanded money from one of the tellers while armed with a knife. The suspect then took off on foot with an undisclosed amount of cash. The suspect is described as a white man, about 5'10", weighing around 130 lbs. Anyone with information is asked to call the Chico Police Department Detective Bureau at 897-5820.