New Delhi: The National Investigation Agency has arrested another accused in an alleged terror conspiracy aimed at expanding the network and extremist ideology of a Jama'atul Mujahideen Bangladesh offshoot in West Bengal and northeastern states.

The suspect was taken into custody in West Bengal on a Saturday. Authorities reported recovering several digital devices from his possession, including mobile phones and memory cards.

This latest apprehension follows a series of raids conducted by the federal agency on September 29 across 16 locations in Assam, West Bengal, and Kerala, which resulted in 13 arrests related to the same file. The inquiry focuses on Imam Mahmuder Kafila, an offshoot of the banned militant group accused of trying to sway vulnerable youth and establish a stronger footprint in India.

According to federal investigators, the conspiracy involved spreading extremist ideologies throughout West Bengal and northeastern regions like Assam and Tripura. The network allegedly operated through secret gatherings, religious indoctrination sessions, and the distribution of radical materials.

Probers state that members utilised digital tools, such as the Telegram messaging platform, to propagate anti-India sentiments and groom new recruits. The objective was reportedly to foster allegiance to the banned organisation's leadership and build an underground infrastructure.

This development succeeds a chargesheet filed by the agency against 11 individuals before a special court in Guwahati, Assam, on June 25, 2026. That filing invoked relevant sections of the Bharatiya Nyaya Sanhita and the Unlawful Activities Prevention Act.

Among those previously named were Nasimuddin, who allegedly directed operations in Assam, and Jagir Mia, accused of steering the outfit's faction in Tripura. Investigators have continually gathered electronic documents and digital archives throughout the proceedings.

The September sweeps included 10 locations in Assam, five in West Bengal, and one in Kerala. These operations were designed to unearth evidence concerning radicalisation efforts and potential cross-border connections tied to the extremist faction as the inquiry persists.