The dead man was identified as Business Chan, 57. Sanjib Saha, 54, and Rashid Harunur, 58, were believed to be comatose and were rushed to Pattaya Memorial Hospital.
Witnesses said they saw the men take a prostitute to their room at the Bella Express Hotel Pattaya.
Police believe the prostitute drugged the men and stole their possessions, as there were no signs of a violent struggle. A drug was found, along with signs that the Bangladeshis’ belongings had been rummaged through, and some of their items were missing.