Police have released a CCTV image of the last known movements of a woman who has been missing for over a week.

Zhihui, aged 67, from Oxford, has been missing since October 3.

Police said they are 'very concerned' for her welfare.

She was seen on CCTV on the Marston cycle path near Linacre College, Oxford at around 6.50pm on October 3. 

Thames Valley Police said: "We appreciate the image is not of the best quality but we hope someone might recognise Zhihui or her clothing."

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The police search has been ongoing alongside Lowland Rescue Oxfordshire and University of Oxford security services.

The emergency search included a search dog and a Marine Unit. 

A regular parkrun in University Parks in Oxford was cancelled 'at the last minute' Saturday morning (October 12) when organisers were told a ‘major police operation’ was taking place. 

A TVP spokesperson confirmed a Lowland Search Oxfordshire operation was carried out as part of efforts to find the missing woman.

Searching the water and surrounding parks is one line of enquiry in the ongoing investigation, a spokesperson said.

Anyone who may have seen Zhihui in the park on or since the evening of October 3 should report it to the police via our website, quoting reference number 43240476224.

If you see Zhihui, call 999.