UPDATE Sept. 17: An investigation into the matter has revealed the video was not leaked, as the cellphone was blocked from sending video, Murrieta police said. Read more here.

Video of girls changing for PE at Shivela Middle School in Murrieta is in the hands of authorities now.

Officials with the Murrieta Valley Unified School District confirmed Thursday that a student used her cellphone to take video of her fellow students in the locker room as they were dressing out for sixth period PE. The class is for seventh- and eighth-graders, ages 12 and 13.

Brent Coley, assistant principal at Shivela Middle School, confirmed the video existed and that steps are being taken to rectify the situation.

"It has been viewed by [female] administration," Coley said,

Witnesses said the girl told fellow students she sent the video to everyone on her cellphone contact list. School and district officials were also looking into whether the video was published on any social media websites.

The girl is being disciplined, but Coley could not go into detail because of student privacy laws.

"We want to make sure we do a thorough investigation and get to the bottom of it," Coley said.

The district's technology department was seeking access to the girl's Facebook page, in the event it was posted there, according to Karen Parris, MVUSD spokeswoman.

Parris said the matter was also being investigated by the Murrieta Police Department.

It can be a crime to videotape others without their consent in what is supposed to be a private setting, according to Murrieta police Lt. Tony Conrad.

The school's cellphone policy is such that students are allowed to bring their phones to school, but must keep them off and in their backpacks.