The Blue Earth County Sheriff’s Office is investigating an aggravated robbery incident in rural Lewisville reported early Thursday morning. Authorities say shortly after midnight, three adult males allegedly physically assaulted the occupants inside the residence. The sheriff’s office says shots were fired at the scene but no one was hit. Cash and miscellaneous items were taken from the residence and one adult male was treated for injuries at a local hospital. The investigation into the incident is continuing and authorities say there does not appear to be a threat to the general public.