An investigation is underway after a woman spent the night in a maximum-security prison in Scotland when police kept her there for having supposedly “masculine features.”

Police Scotland is now investigating how the woman who a spokesperson said was taken into custody with “incomplete information about her gender” was remanded in HMP Perth instead of the country’s women’s prison after a court appearance on Oct. 21.

“We are reviewing our custody procedure to ensure this does not happen again,” the spokesperson added. “This is a complete embarrassment for everyone involved.” “Taking a female to a male prison and leaving her there is a shocker.”

By the time the error was discovered, it was reportedly too late to transport her to Cornton Vale, so the female prisoner was swiftly taken to segregation at HMP Perth overnight. 

For Women Scotland, a campaign group, said the incident was highlighting the ‘sloppy recording and reporting of sex’ versus the person’s gender identity.

The group added that the female prisoner sent to HMP Perth ‘has definitely been put at risk’.

A spokesperson for the Scottish Prison Service said that they had procedures to keep every prisoner safe when a new one is admitted, which includes separating the new arrival from the mainstream prison population ‘where appropriate’.

Even after authorities discovered they had brought the woman to the wrong facility, she was forced to stay overnight in the men’s prison because it was too late to facilitate a transfer. She was kept in segregation before being moved the next day. “An assumption was made, based on someone’s appearance and not much else,”