Commercial sex is illegal in Sri Lanka, but there is a well-entrenched industry which operates with little fanfare and the occasional police raid.
The up market niche of the industry, which use foreign sex-workers, has operations run by foreigners as well as locals.
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Bananaescort.net had also placed an advertisement in the tourist publication, Explore Sri Lanka, which showed a part of a scantily-clad young Caucasian woman, together with a mobile phone number and web address.
We had to track them for several days before we found where they were operating from, says Immigration Officer Upali Kannangara who was part of the investigation team.