A 58-year-old woman was found fatally stabbed in her Seagate, Brooklyn, apartment Saturday night, authorities said.

Neighbors discovered the woman unconscious on the living room floor of her West 37th Street basement apartment at approximately 9:30 p.m., cops said.

The victim had a stab wound to her torso and a laceration on her head. She was declared dead at the scene, cops added.

Police are investigating and the medical examiner will determine the cause of death.

The identity of the woman was being withheld Saturday night pending family notification.