The FBI has broken up a prostitution ring where 47 children were being exploited.

From the AP (via Google News):

More than 600 adults have been arrested and 47 children rescued in a three-day roundup targeting people who force children into prostitution.

The FBI said the roundup by federal, state and local law enforcement occurred in 29 cities, adding that the raids dismantled 12 large-scale prostitution operations run through call services, truck stops, casinos and Web sites.

Breakdown of the arrests:

The 47 rescued children ranged in age from 13 to 17, and all but one are female. Of these, Pistole said, 10 had been reported to the National Center for Missing and Exploited Children.

A total of 642 people were arrested. The FBI says they include 73 pimps and 518 adult prostitutes.

The operation was part of a larger, five-year initiative that has led to the recovery of 575 children and the dismantling of 36 criminal operations since June 2003.

Child prostitution has taken on a new urgency in recent years with the growth of online networks where pimps advertise the youngsters to clients. The FBI generally gets involved in child prostitution cases that cross state lines.

A University of Pennsylvania study estimated that nearly 300,000 children in the United States are at risk of being sexually exploited for commercial purposes.