An effort to crack down on prostitution in Forsyth County’s massage parlors has resulted in the arrests of three women, including one who faced the same charge last year.

The Forsyth County Sheriff’s Office charged Mi Suk Yang, 47, of Marietta and Kil Cha Hurst, 65, of Jonesboro with prostitution on Wednesday.

Sheriff’s Inv. Derek Bleisath said the women were taken into custody at Sun Sauna Spa on Atlanta Highway after Yang “offered an undercover officer a sexual act for money.” Hurst had reportedly been bringing potential clients there.

Investigators said a third woman, 50-year-old Seong Ok Yoo of Hampton, was also charged with prostitution after she propositioned an undercover officer at Green Spa on Buford Highway. In addition, Yoo did not have a massage therapist’s license.

A Forsyth County jail spokeswoman said Friday that the women had been released, though she did not know their bond amounts.

No one answered calls made to Sun Sauna on Friday. A woman who answered the phone at Green Spa said the business was open.

Last week’s incident came a year and two weeks after Yang was charged with prostitution for propositioning an undercover officer at the same business.

According to the Forsyth County Clerk of Court’s Office, Yang is expected to appear in state court later this month on the Sept. 17, 2008, charge.

“This is the third time we were able to arrest someone out of [Sun Sauna] for prostitution since September,” Bleisath said.

Sheriff’s Lt. Col. Gene Moss said details of the investigation will be sent to the county’s business license division.

Moss said there are legitimate massage businesses in the county. Based on complaints, however, authorities think Sun Sauna and Green Spa are “fronts for prostitution.”

Information on Sun Sauna’s Web site includes a code of ethics attributed to the American Massage Therapy Association.

The rules state that therapists should “refrain from engaging in any sexual conduct or sexual activities involving their clients.”