(CNN) -- The FBI on Wednesday shut down a website advertising children for prostitution -- a move made as part of a broader crackdown on the sex trafficking of minors, law enforcement sources told CNN on condition of anonymity. Federal agents closed myredbook.com in a raid in San Francisco. Two people were arrested on suspicion of operating the site, the sources said . The raid stems from a national child sex trafficking crackdown in which the FBI said it rescued 168 children and arrested 281 alleged pimps this month. Some of the rescued children were identified through myredbook.com, one of the law enforcement sources said. The FBI acknowledged an ongoing investigation, but would not provide specific information.
Sources: FBI closes myredbook.com . Website alleged to have advertised children for prostitution . Two people arrested in San Francisco in connection with raid, sources say . Raid comes amid crackdown on sex trafficking of minors .