Thai police say a Chinese national arrested after a vehicle crash in Chon Buri has been linked to scammer networks operating in Cambodia, prompting a review of Thailand’s immigration screening and elite visa systems. Investigators believe the cache of military-grade weapons found near Pattaya was intended for violent disputes between rival scam gangs rather than attacks inside Thailand.
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The case centres on 31-year-old Chinese national Mingchen Sun, whose arrest followed a rollover crash in Chon Buri province. Police later uncovered a large weapons stockpile hidden inside a residence near Pattaya, including C4 explosives, assault rifles and fragmentation grenades.
Speaking at Royal Thai Police headquarters, police spokesman Pol Lt Gen Trairong Phiwphan said forensic examinations and digital investigations had uncovered chat records, weapons training images and evidence showing the suspect had been collecting weapons since late last year. Investigators also identified financial activity worth tens of millions of baht linked to bank accounts and cryptocurrency wallets allegedly connected to scam operations in Cambodia.
Police said there was no evidence the suspect or his network planned terrorist attacks in Thailand or intended to target Thai citizens. Authorities believe the weapons were connected to preparations for conflict between rival scam syndicates operating across borders.
Investigators are also examining companies previously registered by the suspect and his former wife, along with the circumstances surrounding their marriage. Immigration checks found Mingchen Sun entered Thailand legally using both Chinese and Cambodian passports and held a PE visa, or Privilege Entry Visa, intended for wealthy foreigners.
Authorities also discovered the suspect held long-term residency status in South Korea and possessed a pink identification card issued to non-Thai nationals living in Thailand. Police confirmed they are investigating allegations that officials accepted 2,000-baht bribes to falsify information used in issuing pink ID cards.
The investigation has so far implicated six suspects, including state officials accused of involvement in the illegal sale of Glock pistols to unqualified buyers. The Metropolitan Police Bureau has launched both criminal and disciplinary proceedings.
Police are continuing efforts to trace the origins of the military-grade weapons, despite attempts to erase serial numbers from firearms. Investigators said they had already identified the source of at least one weapon and were expanding efforts to uncover the wider smuggling network.
Pol Lt Gen Trairong said Thailand was not a base for transnational criminal organisations or Chinese grey-capital networks, but acknowledged the country’s proximity to neighbouring scam compounds and its status as a tourism hub could leave it vulnerable to exploitation. Thai authorities are now coordinating with both China and Cambodia as part of the investigation.
The Nation reported that the suspect remains under close guard after reportedly suffering severe convulsions and shock following three days without food at Pattaya Remand Prison. He was transferred to hospital for urgent treatment and the hospital has sent samples to the Medical Science Center for analysis of blood alcohol content, cyanide and benzodiazepines. Official results are expected within 5-15 days. The suspect is being guarded by special commando officers while investigators continue building the case using digital and forensic evidence.
Pictures courtesy of The Nation
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Adapted by ASEAN Now Nation 13 May 2026
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