Chiang Mai's seven mysterious deaths continue to perplex our minds much like in the X-Files series.
In a related development, health officials in northern Thailand are now entertaining the possibility of poisoning due to chemicals used to kill rodents, Australia's News.Com said.
Widening the possible causes of deaths, Thai investigators now consider virus, chemical causes and other environmental factors to be the culprit.
Homicide and substance abuse were ruled out as the causes of deaths, said The Australian.
A pesticide containing the toxic chlorpyrifos was implicated as responsible for the deaths of seven tourists from Britain, Canada, France, New Zealand and the US this year in an earlier report.
The local media reported the hotel manager of Downtown Inn—located 800 kilometers north of Bangkok and where all the deaths occurred—denied using the insecticide, a substance that is regulated in the US.
The hotel owners were not available for comment.
Launching their own investigation, Chiang Mai officials claimed there was insufficient evidence to support the claim that insecticide poisoning was the cause. The mysterious deaths have negatively affected the local tourism industry.
Details of this report here.