A tense situation unfolded at a Bangkok condo as Division 1 police led a team to arrest a Singaporean man, a high-level surveillance criminal, who used his youthful appearance to evade capture while hiding in Thailand for three years. Investigators uncovered extensive orders of poisons and explosive compounds from dark web sources, which the suspect claimed were meant for suicide.
On 4 Sep 2026 GMT+7, Police General Kittirat Punpetch, Commissioner of Police, instructed Police General Samran Nualma, Deputy Commissioner and Director of the Narcotics Suppression Center, and Police Lieutenant General Krisada Kanchanalongkorn, Assistant Commissioner, to prioritize drug-related complaints causing public distress. Police Lieutenant General Siam Boonsom, Metropolitan Police Chief; Police Lieutenant General Noppasin Poolsawat, Deputy Chief; Police Major General Theeradej Thammasuthi, Deputy Chief responsible for narcotics; Police Major General Samart Promchat, Commander of Metropolitan Police Division 9; Police Colonel Woraphot Rungkrajang, Deputy Commander of the Metropolitan Police Special Investigation Division; and Police Colonel Theerachai Dedkad, Deputy Commander of Division 9, along with relevant officers, launched an operation to track and arrest Joel Ong Seng Yong, 40, a Singaporean, at a well-known condo in the Bang Khae area of Bangkok under the jurisdiction of Lak Song Police Station.
Authorities seized 3 grams of crystal methamphetamine along with extensive drug use paraphernalia, 200,000 baht in cash, and two mobile phones. Evidence included orders for lethal poisons worth 18,000 baht. Dangerous chemicals related to explosives were found, such as 0.5 kilograms of potassium chlorate, sodium metabisulfite, ammonia solution, nitric acid, borax, and two bomb detonator devices.
Information coordinated with Singapore’s Central Narcotics Bureau (CNB) revealed that Joel is a high-level surveillance criminal with outstanding warrants in Singapore. He has a history of multiple serious offenses involving drugs and violent crimes, making him a dangerous repeat offender posing a security threat.
Initially, he was charged with unauthorized possession of a Category 1 narcotic (methamphetamine), illegal use of methamphetamine, and being a foreigner in the kingdom after his permitted stay had expired. Investigations into charges related to bomb preparation and ordering hazardous substances are ongoing, pending further examination and additional charges.
This arrest followed a tip received in late January 2026 via the Narcotics Suppression Hotline 1386, reporting that a Singaporean named Joel was hiding in Thailand. He was reportedly abusing crystal meth, exhibiting violent behavior, assaulting others, and detaining victims in a manner resembling sexual deviance.
Upon receiving the tip, Police Major General Theeradej Thammasuthi, Deputy Chief of Metropolitan Police, led officers from the Metropolitan Narcotics Suppression Center in a three-month investigation. Joel’s identity was elusive until collaboration with Singapore’s CNB confirmed he was a special surveillance criminal with a long record of drug and violent crimes in Singapore. He had been in Thailand nearly three years posing as a "student" because he was not yet on the Interpol wanted list. Investigators found clues that he frequented entertainment venues in the city center seeking female escorts.
The investigation team went undercover as tourists, scouting the city center for weeks until they met an entertainer who knew Joel. She revealed he often used violence against her, causing her eye hemorrhages, and exhibited erratic behavior including suicidal suggestions and threats with a knife. Most alarmingly, he planned to poison a water tank to cause mass casualties. Further probing uncovered evidence that Joel had ordered 20 grams of a poison 10,000 times stronger than morphine and 10 grams of euthanasia or execution drugs from the dark web, with payments completed. Chemically, these amounts could kill many people if used. Authorities immediately informed their superiors.
On 3 Sep 2026 GMT+7, officers from the Metropolitan Narcotics Suppression Center and the Immigration Police Investigation Division raided the luxury condo in Bang Khae. They stationed surveillance before storming the suspect’s unit and arresting Joel. They found 3 grams of crystal meth and drug paraphernalia. Phone data revealed communications ordering mass poison and multiple dangerous chemicals related to explosives, plus two detonator devices. After the arrest, Police Lieutenant General Siam Boonsom personally interrogated Joel before handing him to Lak Song Police Station for legal proceedings.
During questioning, Joel confessed he had been arrested three times in Singapore for drug offenses, serving 1 year, then 3 years, then 5 years, and had been caned three times. In 2024, after another offense, he fled to Thailand, vowing never to return, preferring death over going back. He sold property in Singapore for about 5 million baht but was defrauded of 2.5 million baht by a compatriot, causing ongoing stress and worsening his mental state. His current girlfriend’s frequent absences aggravated his desire to live. He claimed the poisons were intended for suicide, ordering large amounts fearing ineffectiveness, and pleaded to die in Thailand rather than be extradited.
Police Major General Theeradej Thammasuthi, Deputy Chief of Metropolitan Police and Police spokesperson, stated that evidence and the suspect’s mobile data show preparation involving lethal poisons. Any delay or error could have led to serious harm. The investigation attributes his behavior to drug-induced psychosis, with no evidence of terrorism. Coordination with Singapore’s CNB identified him as a special surveillance drug criminal. Experts said the chemicals found are insufficient to create deadly bombs. Samples have been sent to forensic laboratories for further analysis. Finally, he thanked the public for their cooperation with police in this operation.