Police are leading a search operation in Capalaba today to locate 38-year-old Natarn Auld, who was last seen in the early hours of December 14 in Capalaba.
Detectives have obtained CCTV footage of Ms Auld approaching a service station on Redland Bay Road, Capalaba at 3.30am on December 14.
This is the last known sighting of Ms Auld before she was reported missing, to date.
Following extensive investigations, a ground search has commenced of the bushland area between Redland Bay Road and Moreton Bay Road.
The search is being conducted with the assistance of State Emergency Service personnel, concentrating on the Coolnwynpin Creek area.
This is the fourth search to be conducted as part of this investigation, following ground searches in the Nudgee area on December 23 and December 29, as well as a ground search in Capalaba also on December 29.
Grave concerns are held for the woman's safety as she has not been contactable for more than three weeks.
Police are appealing to anyone who was travelling in the Capalaba area between 3.30am and 4.20am who may have seen the missing person, or any other person or vehicle that may have been acting suspiciously, to come forward.
Have you seen this woman?
If you have information for police, contact Policelink by providing information using the online suspicious activity form 24hrs per day at www.police.qld.gov.au/reporting or call 131 444.
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, via crimestoppersqld.com.au 24hrs per day or call 1800 333 000.