Homicide Squad detectives are investigating the death of a woman in Langwarrin this morning.
Emergency services responded to reports that a woman was stabbed at a Wood Duck Court address about 6.30am.
The yet to be formally identified woman was declared deceased at the scene.
Officers arrested a 63-year-old man at the address who is known to the woman.
A crime scene has been established while detectives investigate to determine the circumstances surrounding the death.
Anyone who witnessed the incident, with dashcam/CCTV footage or information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au