An NHS worker had cash snatched from an ATM outside an Asda supermarket after she left it in the machine.
The woman, in her 40s, withdrew £70 from outside the store on Ormskirk Road in Aintree on Wednesday, June 2.
After making the transaction, at around 10.25am, the woman forgot to take the cash from the machine.
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It is believed that a person behind her stole the cash.
Merseyside Police has issued a CCTV image of a woman they wish to speak to who could have information in connection with the theft.
Inspector James Halpin said: “The woman pictured may have vital information so if you know her, please come forward.
“For anyone to take advantage of such an understandable mistake is despicable, even more so when the victim is a key worker. Tell us what you know and we’ll do the rest.”
Anyone who recognises the woman, or has any information, is asked to contact Merseyside Police via Twitter (@MerPolCC) or on Facebook (Merseyside Police Contact Centre).
Alternatively you can contact Crimestoppers anonymously, on 0800 555 111 or via their online form at: https://crimestoppers-uk.org/give-information/give-information with reference 21000360891.
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Update: Merseyside Police say the woman pictured has now been identified and will be spoken to in the coming days.