Detroit police say they've found the partially mummified body of a woman in her 80s on the kitchen floor of a house where her mentally troubled sister was living.

Police say they believe the surviving sister had been living with the body for one to three years. They say the body was partially covered with newspapers and that a cat and dog apparently ate part of it.

The Detroit Free Press says authorities removed the surviving sister Wednesday night and took her to a crisis center. She's also in her 80s and appears to have mental problems.

Police say they went to the house after a neighbor called to express concern.