TROY, Mich. -

Troy police said three people have been arrested after it was uncovered that sex acts were being performed for cash at a spa.

Police said an anonymous tip lead them to start investigating Recovery Spa on East Maple Road last fall.

Police said and investigation revealed that several male patrons were paying for sex acts from the spa’s massage technicians.

Two women who were massage technicians at the spa are charged with prostitution: Shun Fu Liu, 39, from Flushing, New York and Ming Yu Quan, 45, also from Flushing, New York.

The owner of the spa, 55-year-old Ok-Suk An of Sterling Heights, turned herself into police and is charged with engaging in an illegal business, soliciting for illegal acts, allowing unlawful acts and not having a massage facility license.