Dozens of foot masseuses from China and Indonesia have been arrested for being allegedly involved in a prostitution racket.
During the raids on various foot massage centres over the weekend, many of the so-called professional masseuses were found in the nude with naked men.
At one centre, police have arrested nearly 40 people.
The women are being held for prostitution and the activities of the massage parlours are being probed.
However, the male clients were released after their statements.
According to a source, cops have also taken into custody a middle-aged manager at one of the massage centres for questioning.
He may be charged with operating a prostitution den.
The foreign masseuses, in their 20s, are said to be not only massaging the feet of male clients, but also offering massage on the "most sensitive" part of the body, as well as sex.
Initial investigations have revealed that the masseuses were from mainland China and some provinces in Kalimantan.
"These women entered the state on work permits, recruited as professional foot masseuses but had been used by certain quarters here to offer sexual services," The Star Online quoted a source as saying.