Six Vietnamese nationals, including two with U.S. citizenship, were found dead in a luxury suite at the Grand Hyatt Erawan Hotel in Bangkok, likely due to poisoning. Police suspect one of the six poisoned the others before committing suicide, with a cyanide-like substance detected in used tea cups. The group had booked multiple rooms, but all the bodies were found in one locked room, with no signs of struggle or violence. A seventh person, related to one of the victims, had left the country and is not considered a suspect. Authorities, including the Thai Prime Minister, are investigating the incident which they stress is not related to robbery or random assault and should not impact tourism.