The raid was conducted after people in the area informed police that the sauna was allegedly used for drugs and could spread Covid-19.
Police reportedly found packs of methamphetamine, a narcotic drug, a syringe and used condoms in the area, while 14 of about 60 employees and visitors reportedly admitted to using drugs.
"Investigation officials would interrogate and check for drug substance on employees, visitors and Jinna Kritjinda, 63, who claimed to be the sauna owner," said Pol Colonel Ekkaphop Tanprayoon, superintendent of Wang Thong Lang Police Station.
"Initially, they will be charged with violating the state of emergency, the Communicable Disease Act and BMA's announcement, while those who used drugs would face additional charges under narcotic laws."
The police added that Jinna was also an owner of an entertainment venue on Pradiphat Soi 19.
"He had been arrested in a drug-related case, but the court had dismissed the charge," the police added.