Immigration police have intensified security on Chinese national Ming Chen Sun, who was found hiding an arms cache. Authorities fear he might commit suicide to evade prosecution. Two soldiers implicated in supplying guns to him have been found, and investigators are urgently pursuing further questioning and revealing suspected arms trading routes in the case.
Following an incident where a car lost control and overturned on the railway bypass road in Huay Yai, Bang Lamung District, Chonburi Province, police found 31-year-old Chinese national Ming Chen Sun driving with his Taiwanese female friend, 33-year-old Ma Yu Hsin. A search of the vehicle uncovered a .45 caliber pistol magazine, war weapons, and a gasoline can, raising suspicion. Investigators coordinated with detectives to search a rented house, uncovering a large arms cache believed to be intended for sabotage or the assassination of key Thai figures.
At the same time, examination of Ming Chen Sun’s mobile phone revealed videos of war weapon firing practice, using a tied chicken leg as a target to improve accuracy, and grenade throwing drills with an instructor demonstrating bomb usage. The training location was identified as the Special Forces Camp 911 in Cambodia, also known as BHQ or the Hun Sen Guard Warrior Training Camp.
In initial questioning, Ming Chen Sun claimed to suffer from depression and intended to carry out a suicide bombing. He said the war weapons found at his residence were purchased through a LINE group chat.
Subsequently, investigators detained firearm instructor Kachon from Pattaya Shooting Range and Petty Officer Methi of the Navy for questioning at Najomtien Police Station. They were found to be involved in supplying weapons to the Chinese suspect. It was learned that Kachon bought one M4 rifle from Methi for 200,000 baht to provide to the suspect. Meanwhile, police are examining financial transactions, communications, and connections among all involved to determine if there is a wider network trafficking war weapons in the area.
Investigations have revealed that the M4 rifle and some explosives were provided by three Navy soldiers, two of whom are still active service members, and one former serviceman. A civilian, the firearms instructor, is also involved in procuring war weapons for the Chinese suspect.
The latest update on 10 May 2026 at approximately 03:00, Chonburi Immigration Office police took Chinese suspect Ming Chen Sun into close custody at their office in Soi Jomtien 5, Bang Lamung District, Chonburi Province. They deployed officers to provide 24-hour surveillance due to concerns he might harm himself, as he repeatedly expressed, “I want to die,” during custody. Further questioning is expected at Najomtien Police Station later in the morning.
At Najomtien Police Station in Sattahip District, Chonburi, the Explosive Ordnance Disposal (EOD) team from the National Police Headquarters, along with forensic officers, inspected the seized evidence from the suspect’s residence to further investigate and trace the sources. Authorities requested no photography during the inspection due to security sensitivities. The seized items total 18 pieces, including firearms and explosives.
Among the evidence found in the vehicle was a Glock 26 pistol, serial number EKR596, registration number KT4501247, with a 9mm magazine containing five rounds inside a black soft holster; a separate 9mm magazine with five rounds; and an M16 ammunition pouch holding 28 rounds of 5.56mm bullets.
Items found inside the house included two M16 rifles; 270 rounds of 5.56mm ammunition; an additional 493 rounds of 5.56mm ammunition; and one box of C4 explosive weighing 2,486.4 grams.
Also found were two sticks of C4 explosive weighing 1,173 grams; four Russian POMZ2 anti-personnel mine traps; one Korean K75 hand grenade; one Burmese M6/01 hand grenade; seven electric detonators; three POMZ2 mine trap fuzes; two POMZ2 safety pins; two remote control receiver-transmitter sets; three bulletproof vests; two gas masks; nine M16 ammunition pouches loaded with 30 rounds of 5.56mm each; and six gas mask filters.
Ma Yu Hsin, the 33-year-old Taiwanese female friend, was interrogated for over 24 hours. She provided useful information for the case and is currently under police custody at Najomtien Police Station. Authorities are coordinating with the Taiwanese embassy to facilitate her repatriation.
Meanwhile, Mr. Jamlong, who was detained as a witness due to financial links with Ming Chen Sun, was questioned and released. He said he was hired to lend his bank account without knowing its use and received 500 baht and a crate of beer in return. Police continue to investigate these details further.
Earlier this morning, the National Police Forensic Office’s Explosives Information Center visited Najomtien Police Station to collect in-depth data on the seized evidence, especially firearms, ammunition, and explosives.
Working officers have been conducting field investigations in Sattahip to track two additional soldiers involved in selling guns. Following the detention of firearms instructor Kachon, Petty Officer Methi of the Navy, and Mr. Jamlong, the account holder who delivered guns to the Chinese suspect, it was revealed that two more accomplices, Sergeant Haeb and Sergeant Boy, remain at large and are being sought.
The timeline of the gun sales to the Chinese man began when firearms instructor Kachon contacted Petty Officer Methi to inquire about available weapons for a Chinese client. Methi then reached out to former Navy soldier Sergeant Haeb, who contacted Sergeant Boy to supply the guns. Mr. Jamlong was merely the intermediary lending his bank account for the money transfer.