A 15-year-old Chicago girl was allegedly sexually assaulted by multiple young men, Chicago police said.
The mother said the girl's uncle told her on Monday morning about a video on Facebook Live that showed the assault, news station WGN reported.
The high school freshman had gone to the store on Sunday afternoon, and her mother became concerned when she did not return home, the station said.
After meeting with the mother, police Superintendent Eddie Johnson ordered detectives to investigate and a missing person bulletin was issued Monday night, Chicago Police Department spokesman Frank Giancamilli said. He said police were reconstructing a timeline and working to identify the suspects.
"The Superintendent was visibly upset when he heard about the case and saw the pictures of the girl and incident on FB Live. He was also very dismayed when he learned that there were people (who) were watching the incident live and no one called police," Giancamilli said.
The girl was found on Tuesday, police said.
She was being treated at a local hospital after the attack, Giancamilli said by email.
The girl's mother approached police Superintendent Eddie Johnson after an unrelated news conference on Monday and showed him images of her daughter being assaulted by five or six young men, Giancamilli said.
It was the latest incident in recent months in Chicago in which the social media site has played a role in broadcasting apparent crimes.