Police investigated "erotic services" postings for Fairfield on Craigslist and conducted the operation at an area motel where suspects arrived after arranging with undercover officers who contacted them at phone numbers listed on their Craiglist advertisements.
Danita Donohue, 34, of Vallejo; Alsalima Madking, 28, of Fairfield; and Tracey Cloud, 33, of Vacaville, were arrested for prostitution, according to police.
Donohue also faces charges of possession of Ecstasy, and her driver, a 32-year-old Fairfield man named Joel Outlaw, was arrested for parole violation.
Cloud also had an additional charge of conspiracy, and her driver, a 24-year-old Vacaville man named Clifton Davis, was arrested on pimping and conspiracy charges, police said.
The purpose of the operation was not necessarily to look at the particular crime of prostitution, but also for crimes that can be associated with it, according to police, who plan on continuing to conduct the operations on a consistent basis.