Svetlana Healy, known as Lana, was last seen at her home at around 9am on Friday, December 8.
The 39-year-old was reported missing on Wednesday, December 13 and police are now appealing for anyone with information on her whereabouts to come forward.
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Inspector Peter Johnstone said: “Lana was reported missing on Wednesday, December 13, and as time passes, we are becoming increasingly concerned.
“If you have seen Lana since Friday, December 8, or have any information regarding her whereabouts, please contact us through 101 quoting reference number 2147 of December 13.”
Svetlana is described as being white and 5ft 6ins tall with long, black hair.
She was last seen wearing a dark coloured jacket and a pink hooded top.