Thai police say they have information that six foreign nationals who were found dead from suspected poisoning in a luxury hotel room in Bangkok were embroiled in a dispute over money.
Police said the six people were apparently involved in a deal to build a hospital in Japan. The dispute concerned an investment of about 280,000 US dollars.
The bodies of the three men and three women of Vietnamese descent in their 30s to 50s were found in the central Bangkok hotel on Tuesday.
In a Wednesday news conference, police revealed that autopsies found a poisonous chemical in the six bodies. They said the same substance was found in cups in the room that the six are believed to have drank from.
Investigators said the bodies had no obvious wounds and there were no signs of struggle in the room. They added that no evidence was found to indicate the involvement of anyone else.