Rochester, MN (KROC AM News)  - Prostitution charges have been filed against two Byron women who were recently arrested as part of an undercover operation by the Olmsted County Sheriff’s Department.

After the department was tipped off about suspected prostitution at the Shanghai Spa, an undercover officer went there August 5th for a massage. While there, a man from Menomonie, Wisconsin entered and also asked for a massage. The criminal complaint says the women were arrested after having sexual contact with both men.

Facing charges in the case are 31-year-old Sanyou Liu and 25-year-old Qian Li. The Wisconsin man, 64-year-old Donald Johnson, has been charged with engaging in prostitution.

All three are scheduled to make their first court appearance next month.