Police are appealing for assistance to help locate a missing woman from Springwood.
Mary Lou Montaigne, aged 74, was last seen by her neighbours at her Sherwood Avenue home on Thursday 17 September 2015.
She was later reported missing to police by family members.
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Officers from Blue Mountains Local Area Command commenced a search for Ms Montaigne, however she has not been located.
Police hold serious concerns for her welfare as Mary suffers from a medical condition, and may not be fully aware of her surroundings.
She is described as being of Caucasian appearance, 165 to 170cm tall. She may also be with a silver/grey Toyota Yaris hatchback with registration plates, CPZ14T.
Anyone who has seen Ms Montaigne or knows of her whereabouts is urged to contact police.