Police have been searching parts of west and central Auckland for missing woman Susan O'Brien, but say they are still stumped by her sudden disappearance.
The 36-year-old was reported missing by colleagues after she failed to show up for work on Wednesday morning.
Police want public help to find her work car, a silver Rav4, with licence plate ETC964.
They say her last communications with friends and family have led to concerns for her safety, but police will not say what that means.
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