The FBI’s Los Angeles Field Office announced multiple law enforcement agencies worked together to rescue 33 missing children in southern California.

“Of the 33 children recovered, eight were being sexually exploited at the time of recovery. Two were recovered multiple times during the operation while on the ‘track,’ a common term used to describe a known location for commercial sex trafficking. It is not uncommon for victims who are rescued to return to commercial sex trafficking either voluntarily or by force, fraud, or coercion,” the office said in a press release Friday.