Looks like a Triad job.6 people died by cyanide poisoning in a luxury hotel in Bangkok. The victims were 4 Vietnamese, and 2 Americans of Vietnamese decent.
This case appears to be murder-suicide, with the murder suspect being among the dead. There was an apparent dispute over investments prior to the murders. I think this news is gonna be a hot discussion in Vietnam. The US government appears interested in this case, so who knows what had happened.