Nigeria, July 29 -- The Shiroro cell of a Boko Haram faction in Niger State, near Nigeria's capital Abuja, is the group's furthest and most successful expansion outside the Lake Chad Basin. Until now, information about the cell of the Jama'atu Ahlis Sunna Lidda'awati wal-Jihad (JAS) group sketched its existence, but left many questions unanswered.

New evidence from ongoing Institute for Security Studies (ISS) research includes interviews with defectors, local victims and women who escaped JAS after being married to some of its fighters. The information sheds light on the Shiroro cell's operations and alliances, and what they mean for counter-terrorism in Nigeria.

Audiovisual material and corroborating reports show JAS embedded deeply in...