Columbia, SC (WLTX) - A federal judge has denied bond Mondayto two Columbia people charged in connection with a nationwide child sex ring.

William Gibson, 21, and Andrea Bostic, 20, appeared before the judge Monday.

Last week, FBI agents arrested the two and charged them with sex trafficking. Previous Coverage:Columbia Arrests in FBI Child Prostitution Ring | Sheriff Lott: They Prey on These Girls

Court documents state that an investigator used an online forum to find possible child prostitutes in the Columbia area. That ledofficers to a Two Notch Road motel, where they said theyfound a 16-year-old girl who said she'd been prostituting herself for a few days. The girl told investigators that Gibson had brought her to Bostic, and that Bostic posted an online ad for the girl.

More than 150 people were arrested during the sting across the U.S., and more than 90 children were rescued.

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