I think it is this one:
The gist of it:
Many girls especially from China are using certain websites to advertising their services. They are mainly on social visit passes and will run their adverts using OKTs (who charged between $400 to $500 per month) during their stay here. They will rent rooms as well as in budget hotels within Chinatown area. That area is becoming the second Geylang.
I guess it will be more checking and raids in that area in the next couple of days.