Four Metropolitan Police officers are under investigation over the arrest and detention of a 15-year-old girl who was later strip-searched.
A police sergeant and three constables have been served misconduct notices by police watchdog, the Independent Office for Police Conduct (IOPC).
The girl was detained at Walworth Police Station in Kennington, south London, on 11 December 2020.
The incident happened shortly after another 15-year-old, a black girl identified only as Child Q, was strip-searched at a school in east London.
Child Q was searched by two female officers without any other adults present and with the knowledge she was on her period.
The investigation into their conduct is ongoing, the IOPC told Sky News on Thursday.
The mother of the girl detained in December 2020 came forward after publicity about Child Q.
The IOPC launched an investigation after the complaint was received in May 2022.
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In a statement seen by Sky News, the watchdog said of the incident: "We can confirm that four Metropolitan Police Service officers have been served misconduct notices as part of our ongoing investigation.
"A police sergeant and three police constables have been served notices in relation to the arrest and detention of the child, who was strip searched by MPS officers.
"Our investigation began following a referral in May 2022.
"The serving of misconduct notices does not necessarily mean disciplinary proceedings will follow.
"Due to the sensitivities surrounding this matter, we cannot provide any further information at this time.
Scotland Yard told Sky News the officers remain in post and have not been placed on restricted duties or suspended.
A spokesperson for the force said: "All of the officers were served with notices at misconduct, rather than gross misconduct.
"Restrictions are not sought in misconduct only cases."