Essex Police were called to Costa Coffee in Chelmsford today after a customer reported she'd found a hidden camera under the sink, with the lens pointed toward the toilet.
Police are now investigating and say they will analyse the device and find out if a crime has been committed.
Stacey Shah, a customer of the Riverside branch of Costa told ITV Anglia she noticed a light from under the sink when she went into the branch earlier today.
She covered the lens with toilet paper to protect other customers and told staff what she had found. They then removed the device from the under the sink and contacted the police.
"I felt really uncomfortable and never expected to find this - I put tissue paper around it because I was worried someone may use the toilet and not see it while I went to report it." Stacey said.
"I'd been in there with my children.
"I told the staff and they seemed shocked. One of them said they would remove it and call the police.
"I got goosebumps when I saw it."
We are aware of the issue at Riverside Retail Park and are supporting the police with their investigations.”
A spokesperson for Essex Police said: "We received reports at around 1pm today, Friday, June 14, that a member of staff found what they believed to be a camera in Costa Coffee toilets, in Riverside Retail Park, Chelmsford."We are now on route to collect the device and it will be seized and analysed to establish whether any offences have been committed."
Anyone with information is asked to call Chelmsford police station on 101 quoting incident 612 of 14/06 or Crimestoppers anonymously on 0800 555 111.