Sonoma County sheriff's detectives Sunday were investigating the death of a woman who appeared to have fallen down a flight of stairs at a west county residence, a sheriff's official said.

The woman, who was not identified, was found at an address off of Magic Mountain Road, in the hills above Cazadero Highway.

A caller reported finding her just before 10 a.m., saying the body was at the bottom of some stairs, sheriff's Lt. Steve Brown said.

The caller had been visiting in the area and did not know the woman, Brown said.

Detectives responded to the scene and were looking into the woman's death to determine whether anything suspicious might have occurred.