Police in Chon Buri have not ruled out terrorism or sabotage as they expand an investigation into Chinese national Mingchen Sun, who is suspected of illegally possessing a large cache of weapons in Thailand. Officers are also examining possible links to transnational crime networks and threats to national security following the discovery of firearms, explosives and dangerous equipment in the province.
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At 4.30pm on 10 May 2026, Pol Maj Gen Phongphan Wongmanithet, commander of Chon Buri Provincial Police, held a press briefing at Na Jomtien Police Station to provide an update on the case. He confirmed investigators were continuing to widen the probe and had already identified some individuals connected to the possession and procurement of weapons linked to the suspect.
Police said no major line of inquiry had been excluded, including possible sabotage, terrorism or involvement with organisations that could affect Thailand’s national security. Investigators are examining behavioural evidence, communication networks and forensic evidence to determine whether the suspect acted alone or as part of a wider operation.
Authorities stated that no clear links had yet been established between the suspect and any high-profile figures or other organised groups. However, officers stressed that every aspect of the case would be thoroughly investigated to establish the full facts and prosecute all those involved under Thai law.
The investigation has also focused on reports regarding the suspect’s mental health. Thailand’s national police chief ordered a detailed psychiatric assessment involving specialist doctors and psychologists to determine the suspect’s condition and ensure legal procedures comply with medical and judicial standards.
Police stressed that any mental health condition would not automatically remove criminal liability given the scale of the weapons haul. Officials noted that the seizure involved war-grade weapons, explosives and hazardous materials that could threaten public safety and national security.
The case has attracted heightened attention because of concerns that the weapons cache could be linked to organised international criminal activity. Thai police said they would continue pursuing all leads while maintaining strict enforcement measures to protect public safety.
Meanwhile, a spokesperson for the Chinese Embassy in Thailand said China would not shield citizens involved in illegal activities overseas. Responding to media enquiries, the spokesperson said Chinese authorities were verifying information connected to the suspect and supported Thai judicial authorities handling the case in accordance with the law.
Thaitabloid reported that “The Chinese government consistently requires its citizens overseas to strictly abide by local laws and regulations, and will not shield illegal or criminal activities by its citizens abroad,” the embassy spokesperson said. China also pledged continued cooperation with Thai law enforcement agencies in tackling transnational crime.
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Adapted by ASEAN Now Thaitabloid 11 May 2026
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