A house fire in Le Sueur County left charred pieces of rubble in an empty lot early Tuesday. The incident happened in the city of Montgomery at about 2:15 a.m. Firefighters were at the scene working to extinguish the fire and any remaining hotspots. First responders were also at the scene to administer any aid necessary. According to authorities, the caller reporting the incident said the fire began with an explosion. The cause of the incident is under investigation. Authorities have not yet reported whether there were injuries involved in the incident.