SINGAPORE, June 29 -- Eleven massage establishments in Singapore are under police investigation after they were found masquerading as traditional Chinese medicine (TCM) clinics, with one implicated in vice activities.

Singapore police said yesterday, in a statement sighted by Channel News Asia, the outlets were flagged during enforcement checks on 181 TCM premises between February 7 and April 14, following public feedback about unlicensed massage services and suspected illicit operations.

While most of the clinics complied with regulations, 11 were found to have employed non-certified individuals posing as TCM practitioners to provide massage services.

One clinic was also found to be offering vice services. A female employee was arrest...