Six people, including two Vietnamese Americans, were found dead in a Bangkok hotel due to cyanide poisoning. Investigators believe a financial dispute over a failed investment in a hospital project in Japan may have led one of the victims to poison the others. The bodies, consisting of three men and three women aged 37 to 56, were discovered by hotel staff when they failed to check out. Forensic analysis confirmed cyanide traces in their blood and in the tea cups and thermoses found in the room. Security footage showed no other visitors and the room was locked from the inside. The FBI is assisting in the investigation, and authorities have ruled out terrorism as a motive.