Emergency services discovered the body of an 84-year-old woman at an aged care facility in Rooty Hill, Sydney's west, on Thursday night. Police were called to the Evans Road facility around 11:45 p.m. and found the elderly woman deceased inside one of the buildings.

A 53-year-old woman, who is believed to have been known to the deceased, was apprehended at the scene. She was subsequently transported to Mount Druitt Hospital for an assessment.

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Authorities have established a crime scene, and detectives have launched an investigation into the incident. A report will be prepared for the coroner. Police are appealing for anyone with information to contact Crime Stoppers.

The body of a woman was found at an aged care home on Evans Road in Rooty Hill, Sydney's west, on Thursday night (Google street view).