Six people have been arrested for allegedly selling cannabis and allowing customers to smoke inside shops on Khao San Road in Bangkok without permission.
They were caught during an inspection by police and health authorities along the road on Friday night, the Department of Thai Traditional and Alternative Medicine's Thongchai Lertwilairattanapong said on Saturday.
The inspection was aimed at finding those who defied Public Health Ministry regulations regarding cannabis control, Dr Thongchai said.
Dr Thongchai said two street vendors who allegedly sold cannabis and its flowers without permission were among the six who were arrested.
Two others were allegedly found breaching the cannabis licence and operating in a restricted area, he said, adding items were seized and taken to Chanasongkram police station.
The fifth person was found to have allegedly allowed customers to smoke cannabis inside a shop and the sixth allegedly provided a smoking room.
All suspects were taken to Chanasongkram police station for legal action.