HAYWARD — Authorities say seven pimps were arrested and six teenaged girls, including one in Marin County, working as prostitutes rescued in the San Francisco Bay Area as part of a nationwide crackdown on child prostitution.

The Bay Area arrests were announced on Monday at the Hayward Police Department's headquarters.

The girls — between 15 and 17 years old — were found last week as part of the three-day Operation Cross Country. The effort included federal and local law enforcement officials as well as the National Center for Missing and Exploited Children.

The FBI says it resulted in the arrests of 104 suspected pimps and the rescue of 79 children across the country.

Four of the girls in the Bay Area were working as prostitutes in Oakland. One was in San Francisco and the other in San Rafael. Dozens of adult prostitutes were also arrested in the Bay Area.