Major General Pol. Thiradej Thamsuthee, Commander of the Investigation Team, Bangkok City Police Department, said the cause of death of the victims has not yet been determined, but is believed to be due to "poisoning".
AP reported that these people were foaming at the mouth.
The police have not yet concluded but have raised a number of questions for investigation. Police detained the tour guide of this group for further questioning, according to Thai newspaper Matichon .
Examination of the scene showed no signs of struggle. Five bodies were found in the same room, one body outside. Among them were 3 women and 3 men. Their luggage was already packed.
The forensic agency is currently conducting a detailed autopsy and examining all relevant evidence.
Thai Prime Minister Srettha Thavisin arrived at the scene at around 9:00 p.m. on July 16.
At the same time, Mr. Srettha asked relevant units to speed up inspection so as not to affect tourists.
"The Prime Minister ordered all agencies to urgently act to avoid affecting the tourism industry," the Thai government issued a statement.
