Mystery of mass poisoning in Bangkok hotel: One of the six people killed in Bangkok hotel by drinking cyanide-laced tea is believed to be murderer, as police rule out suicide and say 'money row' was to blame

  • Reading time:10 min(s) read

  • Six people were found dead at the luxury Grand Hyatt Erawan Hotel on Tuesday
  • Police believe they were murdered based on evidence gathered at the scene 

Police confirmed traces of cyanide were found in the cups and in the bodies of six people found dead in a central Bangkok luxury hotel yesterday, with Thai police believing one of them carried out the murder-suicide.

The victims, two of whom had dual Vietnamese-American nationality and four Vietnamese nationals, were found slumped inside a five-star hotel room at the Grand Hyatt Erawan at around 5pm local time on Tuesday.

A husband and wife among the dead had invested money with two of the other victims, suggesting that money could be a motive, said Noppasin Punsawat, Bangkok deputy police chief.

The investment, worth millions of Baht, was meant to build a hospital in Japan and the group might have been meeting to settle the matter.

‘We are convinced that one of the six people found dead committed this crime,’ Noppasin added.

Police Lieutenant General Thiti Saengsang said: ‘This was not self harm, but someone caused the deaths. We are tracing every step since they got off the plane.’

The deceased – three males and three females aged between 37 and 56 – had last been seen alive when food was delivered to the room on Monday afternoon.

Forensic police chief Lt. Gen. Trairong Piwpan said a mass suicide was unlikely because some of the victims had arranged future things for their trip, such as guides and drivers. 

He added that the bodies were not grouped in the same place – some were in the bedroom, some in the living room – suggesting that they did not knowingly consume poison and wait for their death together. 

In this photo released by the Royal Thai Police, a body lies next to a table with a tea cup and untouched meals on it, in a room at the Grand Hyatt Erawan hotel in Bangkok

In this photo released by the Royal Thai Police, a body lies next to a table with a tea cup and untouched meals on it, in a room at the Grand Hyatt Erawan hotel in Bangkok

Tea cups in the room (pictured) had been used but meals delivered by room service were untouched, police said. It is thought the victims may have consumed cyanide in their tea

Another angle of the table of uneaten food in the crime scene room

Another angle of the table of uneaten food in the crime scene room

Police also released this photo of the Bangkok hotel room where the bodies were found

Police also released this photo of the Bangkok hotel room where the bodies were found

Five of the dead who had checked in at the hotel were named by police as females Sherine Chong, Thi Nguyen Phuong and Thi Nguyen Phuong Lan. Two dead men were Dinh Tran Phu and Hung Dang Van. 

The sixth, who was not registered to stay with them, has not been named. 

Officers said a seventh person whose name was part of the hotel booking was identified by police as a sibling of one of the six victims, who left the country on July 10. Police believe the seventh person had no involvement in the deaths. 

The mysterious circumstances surrounding the deaths of the three men and three women fuelled wild rumours, with several local media outlets initially reporting a mass shooting incident.

But photos released by police of a bloodless crime scene showed plates of untouched Thai food, and two spiked thermos flasks and cups.

The victims had booked several rooms at the Grand Hyatt Erawan Hotel under seven names, and some were staying on a different floor from the room where they were found dead, Metropolitan Police Commissioner Thiti Saengsawang said. 

Investigators said the bodies were foaming at the mouth, an officer from the Lumpini police station said on condition of anonymity because he wasn’t authorised to release information. 

Police said there were no signs of a struggle, and that the residents of the room where the bodies had seemingly already packed their luggage in anticipation of their checkout. 

Thai police officers secure the area during investigations after six people were found dead at the Grand Hyatt Erawan Hotel in Bangkok

Thai police officers secure the area during investigations after six people were found dead at the Grand Hyatt Erawan Hotel in Bangkok

Police cars are parked outside the Grand Hyatt Erawan Hotel in Bangkok, Thailand, on July 16

Police cars are parked outside the Grand Hyatt Erawan Hotel in Bangkok, Thailand, on July 16

Thai Prime Minister Srettha Thavisin talks to media next to the National Police chief Police General Torsak Sukvimol during a press conference after six people were found dead at the Grand Hyatt Erawan Hotel

Thai Prime Minister Srettha Thavisin talks to media next to the National Police chief Police General Torsak Sukvimol during a press conference after six people were found dead at the Grand Hyatt Erawan Hotel

Metropolitan Police Commissioner Police Lieutenant General Thiti Saengsawang speaks during a presser at Grand Hyatt Erawan hotel, where six foreign nationals were found dead, in Bangkok, Thailand, July 16, 2024

Metropolitan Police Commissioner Police Lieutenant General Thiti Saengsawang speaks during a presser at Grand Hyatt Erawan hotel, where six foreign nationals were found dead, in Bangkok, Thailand, July 16, 2024

Members of the media film a forensic police layout of the room where six people were found dead the day before allegedly due to poisoning, during a press conference at Lumpini Police Station in Bangkok on July 17, 2024

Members of the media film a forensic police layout of the room where six people were found dead the day before allegedly due to poisoning, during a press conference at Lumpini Police Station in Bangkok on July 17, 2024

The bodies were discovered by a maid who went to the room after they failed to check out and found it locked from the inside, Thiti said.

He added the deaths appeared to have occurred about 24 hours before police arrived on the scene Tuesday evening after being called by hotel staff.

Thailand’s Prime Minister Srettha Thavisin immediately ordered an investigation into the deaths and personally visited the hotel yesterday to discuss the case with investigators. 

Thailand’s economy is heavily reliant on tourism and Thavisin said he does not want the mystery deaths to negatively impact the country’s image as a welcoming destination for holidaymakers.

Thavisin added the crime was ‘a private matter’, unrelated to national security, and should not affect the lucrative tourist sector. 

‘Hotel staff found their bodies in a room around 5pm (1000 GMT) today,’ the police source told Reuters.

He denied initial reports that the six had been killed in a shooting, saying the investigation was currently focused on a ‘link with a toxic substance.’

Pending the results of autopsies, ‘Our hypothesis is that they ingested something that killed them,’ Thavisin said.

Some of the six foreigners appeared to be on their first trip to the country, while others appeared to be return visitors, he added.

A Thai police officer secures the area during investigations after six people were found dead at the Grand Hyatt Erawan Hotel in Bangkok, Thailand

A Thai police officer secures the area during investigations after six people were found dead at the Grand Hyatt Erawan Hotel in Bangkok, Thailand

Chief of the Police Forensic Science Office Police Lieutenant General Trairong Phiwpan

Chief of the Police Forensic Science Office Police Lieutenant General Trairong Phiwpan

Metropolitan Police Bureau Commissioner Thiti Sangsawang is speaking as National Police Chief Torsak Sukvimol is looking on during a press conference after an incident in which six bodies are found at a hotel in Bangkok

Metropolitan Police Bureau Commissioner Thiti Sangsawang is speaking as National Police Chief Torsak Sukvimol is looking on during a press conference after an incident in which six bodies are found at a hotel in Bangkok

Immigration officers arrive to the Grand Hyatt Erawan where 6 people were confirmed dead after an incident in central Bangkok on July 16, 2024

Immigration officers arrive to the Grand Hyatt Erawan where 6 people were confirmed dead after an incident in central Bangkok on July 16, 2024

Policemen inspect after an incident, in which six bodies were found at a hotel in Bangkok on July 16, 2024. Six people believed to be Vietnamese and Vietnamese-Americans were found dead in a hotel room in central Bangkok on July 16

Policemen inspect after an incident, in which six bodies were found at a hotel in Bangkok on July 16, 2024. Six people believed to be Vietnamese and Vietnamese-Americans were found dead in a hotel room in central Bangkok on July 16

Police are seen at the hotel conducting investigations this evening

Police are seen at the hotel conducting investigations this evening

A police official, speaking on condition of anonymity, dismissed earlier reports in Thai media that the six people had been killed in a shooting

A police official, speaking on condition of anonymity, dismissed earlier reports in Thai media that the six people had been killed in a shooting

Thailand's Prime Minister Srettha Thavisin visits the Grand Hyatt Erawan Hotel

Thailand’s Prime Minister Srettha Thavisin visits the Grand Hyatt Erawan Hotel

Police and media wait outside the entrance of the hotel as investigations continue

Police and media wait outside the entrance of the hotel as investigations continue

The bodies were discovered at the Grand Hyatt Erawan Hotel located in the popular Ratchaprasong Intersection of Bangkok

The bodies were discovered at the Grand Hyatt Erawan Hotel located in the popular Ratchaprasong Intersection of Bangkok

Police in an official statement said they were still investigating the scene and cause of death, but added there appeared to be no signs of fighting, struggle or robbery at the hotel.

The incident comes as Thailand looks to further promote its tourism sector, a key driver of Southeast Asia’s second largest economy.

‘The prime minister ordered all agencies to urgently take action to avoid impact on tourism,’ the Thai government said in its statement.

Thavisin himself refused questions from the press as he arrived at the hotel yesterday, instead making a beeline directly for investigating officers who whisked their leader away from prying eyes for private discussions. 

Meanwhile, US State Department spokesman Matthew Miller said officials are aware of the reports of the deaths of two US citizens in Bangkok. 

The Vietnamese and United States Embassies have been contacted over the deaths, and the American FBI is involved in the investigation, said Prime Minister Srettha Thavisin.

When asked if the news would affect a conference with the Russian Energy Minister at the hotel later today, Srettha said it was unlikely. ‘This wasn’t an act of terrorism or a breach in security, everything is fine.’

Thai authorities are keen to improve the image of the kingdom, whose reputation as a safe tourist destination sometimes takes a hit when grisly crimes are reported. 

In 2023, the country was rocked by reports of a serial killer who had poisoned 15 people with cyanide. Sararat Rangsiwuthaporn, or ‘Am Cyanide’ as she would later be called, poisoned 15 people who she owed money to and became the country’s first female serial killer.

The country has played host to many other sordid and high-profile criminal cases, such as that of French serial killer Charles Sobhraj, nicknamed ‘The Serpent’ and linked to at least two dozen murders – mostly of tourists – in the 1970s.

More recently, the son of a Spanish actor was accused of killing and dismembering the body of a renowned Colombian plastic surgeon on the tourist island of Koh Phangan.

The verdict in the trial is expected in the coming weeks.

Thailand's Prime Minister Srettha Thavisin visits the Grand Hyatt Erawan Hotel, where it is believed that at least 6 people have been reported dead, in Bangkok, Thailand, July 16, 2024

Thailand’s Prime Minister Srettha Thavisin visits the Grand Hyatt Erawan Hotel, where it is believed that at least 6 people have been reported dead, in Bangkok, Thailand, July 16, 2024

Police block media from entering the Grand Hyatt Erawan where 6 people were confirmed dead after an incident in central Bangkok on July 16, 2024

Police block media from entering the Grand Hyatt Erawan where 6 people were confirmed dead after an incident in central Bangkok on July 16, 2024

Visitors stand outside of the Grand Hyatt Erawan where 6 people were confirmed dead after an incident in central Bangkok on July 16, 2024 in Bangkok, Thailand

Visitors stand outside of the Grand Hyatt Erawan where 6 people were confirmed dead after an incident in central Bangkok on July 16, 2024 in Bangkok, Thailand

Five bodies were reportedly discovered inside a room at the Grand Hyatt Erawan Hotel, with the sixth lying by the door, at around 7:30pm local time

Five bodies were reportedly discovered inside a room at the Grand Hyatt Erawan Hotel, with the sixth lying by the door, at around 7:30pm local time 

The entrance to the Grand Hyatt Erawan Hotel is seen in this general view

The entrance to the Grand Hyatt Erawan Hotel is seen in this general view

Last October, a 14-year-old boy opened fire at the Siam Paragon mall in the same area as Tuesday’s mass poisoning, killing three people.

The shooting came just days before the anniversary of a massacre at a nursery in northern Thailand that left 36 people dead and amid government efforts to bolster tourist numbers.

Some 28 million people visited Thailand in 2023, up from 11 million the year before, but still well down from the 40 million who came in 2019, the last year before the pandemic.

Travel restrictions during the Covid-19 pandemic hammered the kingdom’s vital tourism sector and arrivals have not bounced back as quickly as officials hoped.

Officials hope to hit 35 million visitors in 2024, with a target of $55 billion in revenue.

The scene of yesterday’s dark discovery, the Grand Hyatt Erawan Hotel, is among Thailand’s most luxurious and sought after tourist accommodations with a reputation for its service.

Located in the Ratchaprasong district – a highly frequented shopping and commercial area in the Thai capital – the hotel is a five-star venue replete with decadent interiors, a huge outdoor pool, a gym and spa complex and a highly rated restaurant. 

It offers sweeping views of the city and besides the commercial attractions is also located adjacent to the Erawan Shrine, a notable religious site known for attracting tourists. 

Hotel administrators are yet to comment on the incident.  




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