Administrative officials led by an Interior Ministry-assigned task force raided the bar after an anti-human trafficking non-governmental organisation complained that it might be providing underage prostitution services.
The 8.30pm raid also led to the arrest of bar owners Jariya Phusua, 42 and Mongkolchai Pornrattanakul, 46 for operating without a proper licence. Officials have also passed their files to the police to investigate if the couple should also charged with human trafficking.
The under-18 girls were separated and sent for protection and rehabilitation under the wing of the Social Development and Human Security Ministry.