A joint team of the Assam Rifles and Manipur Police arrested Thiyam Boycha Singh, alias "Balin," a 28-year-old self-styled captain of the banned People's Liberation Army (PLA), from Ushoipokpi in Thoubal district on Saturday night, nearly five years after he allegedly took part in the November 2021 ambush that killed Colonel Viplav Tripathi of the 46 Assam Rifles, members of his family, and other personnel in Churachandpur district.
Background
The attack that this arrest is tied to took place on November 13, 2021, when a convoy of the 46 Assam Rifles was ambushed at Behiang in Manipur's Churachandpur district. The assault killed Colonel Viplav Tripathi, his wife, his young son, and several Assam Rifles personnel, and became one of the most widely condemned insurgent attacks on security forces in the Northeast in recent years. The National Investigation Agency (NIA) took over the case given its scale and the targeting of a serving officer's family, and named Thiyam Boycha Singh as the third accused in its investigation.
Balin had remained on the run since the attack, with the NIA placing a bounty of Rs 4 lakh for information leading to his arrest. His continued evasion, even as investigators built a case against him, reflected the broader difficulty security agencies have faced in tracking PLA cadres who operate across Manipur's terrain and, according to preliminary interrogation findings in this case, sometimes cross into neighbouring Myanmar for training and to maintain logistics networks.
Key Details
- Arrested: Thiyam Boycha Singh, alias "Balin," age 28, self-styled captain in the banned People's Liberation Army (PLA)
- Arrest location and date: Ushoipokpi, Thoubal district, Manipur, on Saturday night, August 22-23, 2026
- Arresting agencies: Joint team of the Assam Rifles and Manipur Police
- Case linked: November 13, 2021 ambush on a 46 Assam Rifles convoy at Behiang, Churachandpur district
- Casualties in the 2021 attack: Colonel Viplav Tripathi, his family members, and other Assam Rifles personnel
- Investigating agency: National Investigation Agency (NIA), which had placed a Rs 4 lakh bounty on Balin
- Interrogation findings so far: alleged involvement in PLA training and an extended stay at a camp in Myanmar, and alleged involvement in procurement and transfer of war-like stores and maintaining links with other militant groups
At a Glance
| 2021 Ambush (Behiang, Churachandpur) | 2026 Arrest (Ushoipokpi, Thoubal) | |
|---|---|---|
| Date | November 13, 2021 | August 22-23, 2026 |
| Key figures | Colonel Viplav Tripathi and family, Assam Rifles personnel killed | Thiyam Boycha Singh alias "Balin" apprehended |
| Lead agency | NIA investigation opened | Assam Rifles + Manipur Police joint operation |
| Status | Case remained open for nearly 5 years | Third named accused now in custody |
Local Impact
For the Assam Rifles and the broader security establishment in Manipur, the arrest closes a long-standing gap in one of the force's most painful recent losses — the killing of a serving Colonel and his family remains a stark marker of the risks security personnel and their families face in insurgency-affected districts. For residents of Thoubal and Churachandpur, the arrest is also a reminder of how insurgent networks in Manipur have continued to operate, recruit, and in some cases draw on cross-border training links, years after individual attacks fade from national headlines.
The case is also likely to be watched closely within Manipur's fraught security and ethnic-relations context, where operations against armed groups intersect with wider questions about the state's post-2023 conflict recovery.
What Happens Next
Balin is expected to be handed over to or questioned further in coordination with the NIA, given the agency's ownership of the original 2021 case. Further legal proceedings, including formal charges tied to the ambush and any additional evidence gathered from his interrogation about PLA logistics and cross-border training, are expected to follow in the NIA's special court process. Investigators are also likely to pursue leads on his stated links to other militant groups and any remaining absconding co-accused in the same case.
Frequently Asked Questions
Who was arrested, and why does the case matter?
Thiyam Boycha Singh, alias "Balin," a 28-year-old self-styled PLA captain, was arrested for his alleged role in the November 2021 ambush that killed Colonel Viplav Tripathi of the 46 Assam Rifles along with his family and other personnel — one of the most serious attacks on security forces in Manipur in recent years.
Where and when was he arrested?
He was arrested from Ushoipokpi in Manipur's Thoubal district on Saturday night, August 22-23, 2026, by a joint team of the Assam Rifles and Manipur Police.
What happened in the original 2021 attack?
On November 13, 2021, a convoy of the 46 Assam Rifles was ambushed at Behiang in Churachandpur district, killing Colonel Viplav Tripathi, his wife, his young son, and several Assam Rifles personnel.
Was there a reward for his capture?
Yes. The National Investigation Agency had placed a bounty of Rs 4 lakh for information leading to his arrest.
What has he allegedly admitted or been linked to during interrogation?
Preliminary interrogation has suggested involvement in PLA training, an extended stay at a camp in Myanmar, procurement and transfer of war-like stores, and maintaining links with other militant groups. These are investigative findings at this stage, not a final court determination.
Which agency is leading the investigation?
The National Investigation Agency (NIA) took over the original case given its scale, and named Thiyam Boycha Singh as the third accused.
What happens to him next?
He is expected to face further questioning and formal legal proceedings tied to the NIA's case on the 2021 ambush, including possible additional charges based on his interrogation.
Sources
Organiser, Nagaland Post, Daily Pioneer, Northeast News, SSBCrack, Indian Defence News.