Police raided a luxury house in Saphan Sung district of Bangkok on Friday and found nine foreigners, drugs and a gun.
Police searched the house at a housing estate in Thab Chang area on Friday afternoon.
They found seven men and two women, all foreign nationals, inside the house, where a drug party was taking place. The suspects were two Malaysian men, five Chinese (three men and two women), one Vietnamese man and a man from Myanmar.
Seized from the house were ketamine, 24 tablets of the so-called "five-five" drugs also known as Erimin 5, and a gun, police said.
The raid came after the police received a complaint from residents at the housing estate that parties with loud music were often held at this house.
All nine foreigners were taken to Bang Chan police station for legal action.