The FBI says agents and local police in the last week rescued 168 victims of child sex trafficking, including many who had never been reported missing.

In addition, 281 pimps were arrested as part of the same nationwide initiative, an annual enforcement push known as Operation Cross Country.

FBI Director James Comey told reporters Monday that the children who were rescued did not come from faraway lands but were instead ``America's children.''

This is the eighth such week-long operation. The FBI says nearly 3,600 children have so far been recovered from the streets.

Comey says one worrisome trend is the increasing prevalence of children being prostituted online.

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