Victoria Police officers looking into the disappearance of Epping mother Ju "Kelly" Zhang have issued a statement appealing for CCTV footage of two cars as part of the investigation.
Ms Zhang, 33, was last seen at her home on Winchester Avenue, Epping, about 5:30pm on February 1.
She was wearing a pink pyjama top, shorts and had bare feet. The only thing she had with her was her mobile phone.
On Saturday, police said they held significant concerns for Ms Zhang, who was described as a devoted mother who would not leave her eight-year-old son alone.
The child is being cared for by her ex-husband.
Police said Ms Zhang's partner, Joon Seong Tan, 35, told them she went for a walk and never returned. The Doncaster man was arrested and questioned on Sunday and later released without charge.
Police officers are in Epping and Doncaster talking to local residents in a bid to gather evidence about Ms Zhang's disappearance.
They are searching for CCTV of a black 2008 Mazda CX9 with the registration WKE 850, and a white Toyota Land Cruiser.
In a press release, police said they believed the two cars travelled through the areas sometime between 4:00pm on February 1 and 8:00am on February 2.
Anyone who has CCTV of either car is urged to contact Crime Stoppers.
