Six people have been arrested on prostitution-related charges at a massage parlor in Vista, San Diego County Sheriff's officials said.
Five masseuses were cited for not having a masseuse license. Two of them were also cited for not covering a client and illegal touching.
Authorities conducted an undercover raid on Tuesday after some masseuses complained of prostitution activity and others reported seeing numerous men visiting the business at night.
In June 2009, 26 Chinese nationals were arrested after similar investigations at nine massage parlors in the area.