A resident and their pet have been displaced after a senior living apartment building fire in Sun Prairie Thursday that caused $5,000 in damage. Sun Prairie Fire and Rescue responded to the apartment building on the 600 block of Thomas Drive at around 5:55 p.m. for a reported fire, Assistant Fire Chief Bill Sullivan said. Fire crews found residents evacuating upon arrival then entered the building to find smoke in a public hallway and a small fire in a bathroom of one of the apartments. The building had an active fire alarm system that alerted the residents after one resident pulled the alarm. Sullivan said the apartments did not have fire sprinklers. The fire alarm was reset. Crews were able to put out the fire and confirmed the fire did not extend beyond the bathroom, Sullivan said. Power to the affected apartment was shut off.