One person is injured in a house fire in New Ulm. It happened late Monday night on North Spring Street. Upon arrival, the house was filled with smoke. The Police Department assisted in evacuating the occupants. Crews extinguished the fire on the lower level and were on scene for approximately 1 ½ hours. The cause of the fire is still under investigation. The smoke alarm on the main floor was working. One occupant was transported by Allina Ambulance.