An elderly woman was bludgeoned to death by her granddaughter at Lapang village under the Bhandaripokhari police station in Bhadrak district on Friday night.However, the identity of the deceased was yet to be ascertained.As per reports, an altercation erupted between the two over some matter at late night. In a fit of rage, the minor girl hit her grandmother with a pestle killing her on the spot. Though the exact reason behind the alleged murder was yet to be ascertained, family feud was suspected to have led to the incident.On receiving information, the Bhandaripokhari police reached the spot and began an investigation into the incident. The cops also have detained the girl for interrogation.