Indonesian police have detained 51 men, including several foreigners, in a raid on what authorities describe as a "gay spa" in Jakarta.
Some could face up to six years in prison under pornography and prostitution laws.
The arrests late on Friday are the latest in a spate of high-profile police actions against gay clubs and parties in Indonesia this year that have called the country's reputation for tolerance into question.
With the exception of the ultra-conservative Aceh province in northern Sumatra, where Islamic law is enforced and two men were publicly flogged last month for gay sex, homosexuality is legal in Indonesia, home to the world's largest Muslim population.
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Among those detained at the spa in Central Jakarta were four Chinese nationals, a Singaporean, one Thai national, one Malaysian, and one Dutchman, although none of the foreigners would be charged, Jakarta police spokesman Argo Yuwono told Reuters on Saturday.
When asked about what the people in the spa were doing at the time of the raid, Mr Yuwono noted that it was dark at the time.
"LGBT is clearly between men and men or same-sex relationships. Male prostitution," Mr Yuwono said, without clarifying further. He said those charged could face up to six years in prison under Indonesia's pornography law.
"There's a cashier, the manager there and also those providing facilities like towels and other things," he said.
Activists say police targeting of consensual gay sex has shone a light on discrimination and harassment in the world's third-largest democracy.