Union Home Minister Shri Amit Shah undertakes a review of the security of Siliguri corridor
The Ministry of Home Affairs conducted a high-level review of security arrangements along the Siliguri corridor in West Bengal
The review was attended by senior officials from central ministries and forces, including the Ministry of Home Affairs, Ministry of Road Transport and Highways, the Army, the Border Security Force (BSF), the Sashastra Seema Bal (SSB) and the Railway Protection Force (RPF), along with the Chief Secretary and Director General of Police of West Bengal
The review focused on strengthening border surveillance, improving coordination among central forces, intelligence agencies and state police, and addressing cross-border movement and connectivity infrastructure in the corridor
A proposal for a "triangular grid" of reinforced garrisons in the wider corridor region was discussed as part of the strengthened security approach
Siliguri Corridor — Geography and Strategic Significance
The Siliguri corridor, popularly called the "Chicken's Neck," is a narrow strip of land in northern West Bengal that forms the sole land connection between mainland India and its northeastern states, making its geography a recurring subject in both physical and strategic geography questions.
Key Details
- Width: narrows to approximately 20-22 km at its thinnest point (some estimates cite figures as low as 17 km)
- Connects mainland India to eight northeastern states: Arunachal Pradesh, Assam, Meghalaya, Manipur, Mizoram, Nagaland, Tripura and Sikkim
- Bordered by Nepal to the west, Bangladesh to the south, and Bhutan to the north, with the China-Bhutan-India tri-junction near the Chumbi Valley in proximity
- Virtually all surface trade and troop movement between the northeastern states and the rest of India passes through this corridor, making it a single point of vulnerability
The corridor's narrow width and multi-country border proximity are precisely why a coordinated, multi-agency security review — spanning the Army, central armed police forces, and infrastructure ministries — is required for this specific stretch of territory.
Border Guarding Forces and the "One Border, One Force" Principle
India assigns different Central Armed Police Forces (CAPFs) to guard different international borders, based on a principle recommended after the Kargil conflict to fix accountability and build border-specific expertise.
Key Details
- The Kargil Review Committee (1999-2000) recommended the "one border, one force" principle, later operationalised as: BSF for the Pakistan and Bangladesh borders, Indo-Tibetan Border Police (ITBP) for the China border, SSB for the Nepal and Bhutan borders, and Assam Rifles for the Myanmar border
- SSB (Sashastra Seema Bal): guards the 1,751 km Indo-Nepal border and the 699 km Indo-Bhutan border; originally raised in 1963 after the Sino-Indian war, given border-guarding responsibility for Nepal in 2001 and Bhutan in 2004
- BSF: guards the Indo-Pakistan border and the roughly 4,096 km Indo-Bangladesh border, covering Assam, West Bengal, Meghalaya, Mizoram and Tripura
- All CAPFs, including BSF and SSB, function under the administrative control of the Ministry of Home Affairs
Because the Siliguri corridor sits at the confluence of the Nepal, Bhutan and Bangladesh borders, its security review necessarily brings together both SSB and BSF alongside the Army — a direct illustration of how the "one border, one force" division of labour operates in a single geographically compressed zone.
Chicken's Neck Vulnerability in Internal Security Planning
The corridor's narrowness has long been flagged in India's internal security and border management doctrine as a "vulnerable corridor" requiring dedicated infrastructure and force-posture planning, distinct from routine border-guarding along wider frontier stretches.
Key Details
- Vulnerability arises from both the narrow width and the corridor's proximity to three international borders and a tri-junction area
- Institutional responses in border management typically combine physical infrastructure (roads, rail redundancy through corridors like the Bogibeel Bridge in Assam), force redeployment, and multi-agency coordination mechanisms akin to the one described in this review
- Border Area Development Programme (BADP) and border infrastructure schemes under the Ministry of Home Affairs and Ministry of Road Transport and Highways address connectivity resilience in such corridors
The review's emphasis on coordinating road infrastructure (via MoRTH) alongside force deployment (Army, BSF, SSB, RPF) reflects the standard doctrinal response to chicken's-neck-type vulnerabilities: redundancy in connectivity plus layered force presence.
- Siliguri corridor width at narrowest point: approximately 20-22 km
- Number of northeastern states connected via the corridor: 8
- Bordering countries: Nepal (west), Bangladesh (south), Bhutan (north)
- SSB border charge: Indo-Nepal border (1,751 km) and Indo-Bhutan border (699 km)
- BSF border charge: Indo-Pakistan border and Indo-Bangladesh border (~4,096 km)
- "One border, one force" principle recommended by: Kargil Review Committee (1999-2000)
- Agencies represented in the review: MHA, MoRTH, Army, BSF, SSB, RPF, West Bengal Chief Secretary and DGP