A tip from Facebook led to the arrest of "Girl in the Closet" Lauren Kavanaugh after she admitted having a sexual relationship with a 14-year-old girl, Facebook and Lewisville police said Friday.

Lauren Kavanaugh was being held on $10,000 bail. (Denton County Jail)

A Facebook spokeswoman said "our technology detected a potentially inappropriate interaction" and reported it earlier this month to the National Center for Missing and Exploited Children.

Facebook then disabled Kavanaugh's account.

The spokeswoman did not elaborate on what concerned the company about Kavanaugh's Facebook page, "The Lauren Kavanaugh Story."

Lewisville police Capt. Jesse Hunter confirmed that the tip came from Facebook but declined to provide details because the information is contained in an arrest-warrant affidavit that has been sealed by a municipal judge.

Police are searching for other potential victims. Hunter said Friday afternoon that none have come forward.

The National Center for Missing and Exploited Children did not respond to a request for comment.

As a child, Kavanaugh was the victim of horrific abuse at the hands of her mother and stepfather. She was rescued from a feces-laden closet infested with lice in June 2001. She had been sexually assaulted, starved and kept locked in the closet for years. She was 8 years old but thought she was 2. She weighed just 25 pounds and nearly died.

Her mother and stepfather, Barbara and Kenneth Atkinson, are serving life sentences in Texas prisons. They are eligible for parole in 2031.

Facebook announced in October that the company began using "artificial intelligence and machine learning" to detect child nudity and content that exploits children when it is uploaded.

"We're using this and other technology to more quickly identify this content and report it to NCMEC, and also to find accounts that engage in potentially inappropriate interactions with children on Facebook so that we can remove them and prevent additional harm," a Facebook spokeswoman said.

The News profiled Kavanaugh in an eight-part series in 2013 that became a Pulitzer Prize finalist.

Kavanaugh was arrested Wednesday and remained in the Denton County Jail on Friday in lieu of posting a $10,000 bond. It is unclear whether she has an attorney.