Khthon documents mass graves, atrocity crimes, and forensic evidence from conflict zones worldwide. Our work is strictly humanitarian and apolitical.
This site may contain imagery and descriptions of deceased individuals, violent injuries, and human remains gathered in the course of active investigations. Content is presented for accountability and documentation purposes only.
Khthon documents mass graves, atrocity crimes, and forensic evidence from conflict zones worldwide. Our work is strictly humanitarian and apolitical.
This site may contain imagery and descriptions of deceased individuals, violent injuries, and human remains gathered in the course of active investigations.
Khthon · Active Investigation
Nigeria's grave landscape is shaped by both insurgent atrocities and state violence — Boko Haram and ISWAP in the northeast, and security forces implicated in mass executions including the Zaria massacre of 2015. Two actors, two burial signatures, one documentation challenge.
Dual-Actor Landscape
Nigeria's conflict presents one of the clearest examples in our coverage of overlapping state and non-state burial systems — each with a distinct spatial logic readable from satellite imagery.
In the northeast, Boko Haram and its offshoot ISWAP have conducted village massacres, mass abductions, and executions since 2009. Civilians killed in these attacks are often left in situ before hurried burial by survivors, producing shallow communal graves near village edges, dry-season riverbeds, or schoolyards. In some cases, bodies have been transported to secondary disposal sites within scrub belts or orchards, where pits are dug quickly to minimise detection.
"The insurgents' preference for mobility — attacking with motorcycles and light trucks — means their graves are typically close to road spurs or vehicle-accessible terrain. The geometry is hasty, not systematic."
— Khthon Field Assessment
State forces, too, have been implicated. During the 2015 Zaria massacre in Kaduna State, the Nigerian military killed hundreds of members of the Shi'a Islamic Movement of Nigeria (IMN). A later judicial inquiry confirmed the use of mass graves to conceal casualties — reportedly dug with heavy machinery at night and located in rural peripheries. Witness testimony and satellite imagery suggest linear, machine-cut trenches consistent with military burial methods: designed more for rapid concealment than ritual practice.
These incidents highlight the dual role of Nigeria's armed actors in producing clandestine burial grounds — and the analytical challenge of distinguishing burial signatures across the same landscape.
Insurgent Signature
Attacks mounted on motorcycles and light trucks prioritise speed over concealment. Victims are often killed in the open and buried by survivors or left in situ. When militants bury directly, sites appear in orchards, scrub belts, and riverbeds within quick driving distance of the attack site.
Secondary disposal — transporting bodies from attack sites — occurs when militants are operating near bases or want to reduce evidence of kill numbers. These sites show loose, irregular pit geometry, shallow depth, and access via motorcycle tracks or footpaths rather than vehicle roads.
State Signature
Military operations involving mass detentions — including the Zaria 2015 sweep — produce a markedly different burial pattern. Bodies are consolidated and transported to rural periphery sites accessible by vehicle. Heavy machinery produces orthogonal, linear trenches with consistent depth and width.
The Zaria case established the benchmark for Nigerian military burial signatures: machine-cut geometry, soil spoil linearly displaced, access from named security facility roads, and nocturnal execution of the burial to minimise witness exposure. Satellite time-series shows the disturbance appearing overnight.
2009
Boko Haram uprising — Maiduguri crackdown
Boko Haram launches an armed uprising against Nigerian security forces in Maiduguri, Borno State. The Nigerian military's response — the killing of founder Mohammed Yusuf in custody and mass detention of suspected members — drives the group underground and radicalises its membership. Extrajudicial killings of detainees during this period, documented by Amnesty International, produce early state-linked burial sites near military facilities in Maiduguri.
2011–2013
Insurgency escalation — bombings, kidnappings, village raids
Boko Haram expands beyond Maiduguri into Yobe, Adamawa, and Gombe states. Church bombings, police station attacks, and village raids produce mass casualties. Summary executions of perceived collaborators — teachers, civil servants, traditional rulers — result in roadside killings and hurried burials in farmland or near wells. State of Emergency is declared across the northeast in 2013. Military operations cause additional civilian casualties and detention-related deaths.
JAN 2015
Baga massacre — up to 2,000 killed in town assault
Boko Haram captures the town of Baga on Lake Chad, killing an estimated 150–2,000 civilians in a multi-day assault — the scale disputed due to access restrictions. Satellite imagery shows widespread building destruction across the town. Amnesty International analysis of before-and-after imagery documents the extent of destruction. Bodies are left in the open and in structures; burial is carried out by survivors after the group withdraws. The Baga case establishes satellite imagery as a primary tool for Nigerian atrocity documentation.
AUG 2016
ISWAP split — more systematic execution campaign
A faction pledging allegiance to the Islamic State splits from Boko Haram to form ISWAP, eventually becoming the dominant insurgent group in the Lake Chad Basin. ISWAP adopts a more calculated approach — targeting non-Muslims and Nigerian military while attempting to avoid wholesale civilian massacres to build local support. However, executions of humanitarian workers, fishermen, and civilians accused of collaboration continue, producing bodies disposed of in scrub belts and riverbeds near the group's operational zones.
DEC 2015
Zaria massacre — state-linked mass graves confirmed
Following a confrontation between members of the Islamic Movement of Nigeria (IMN) and a military convoy in Zaria, Kaduna State, the Nigerian military kills between 300 and 1,000 IMN members over three days. The military subsequently demolishes the group's headquarters and a religious complex where dozens of bodies are found. A Kaduna State judicial inquiry (2016) confirms the use of mass graves — reportedly dug at night with heavy machinery at a location outside Zaria — and recommends prosecution of military commanders. Satellite imagery corroborates soil disturbance at the identified site.
2019–2021
ISWAP consolidation — systematic executions of farmers and fishermen
ISWAP launches a sustained campaign of executions targeting Christian farmers and fishermen in Borno State, producing dozens of bodies at roadside locations and near fishing communities on Lake Chad. The group publicises some killings through propaganda video; Khthon geolocates these sites using background terrain and vegetation analysis. Bodies in these videos are sometimes later found in shallow pits dug within orchard belts by local communities attempting concealment from further attacks.
2021–2022
Boko Haram collapse — ISWAP absorbs remnants
Following the death of Boko Haram leader Abubakar Shekau in a suicide attack (June 2021), ISWAP rapidly absorbs most remaining Boko Haram factions. The consolidation produces a brief intensification of killings as ISWAP executes uncooperative Boko Haram members. Mass graves from this internecine violence sit in the same terrain types as civilian-targeted burials — near vehicle tracks, in scrub, at the edges of former Boko Haram-held territory — complicating victim identification.
Ongoing
Khthon monitoring — dual-actor signature framework
Khthon maintains active monitoring of northeast Nigeria using distinct analytical frameworks for insurgent and state-linked burial patterns. ISWAP-associated sites are tracked through video geolocation, road-proximity analysis, and shallow earthwork detection near orchard and scrub terrain. State-linked sites are monitored through facility-adjacency analysis and overnight soil disturbance detection in rural peripheries. Coalition work with Nigerian civil-society investigators, UN monitors, and international NGOs ensures evidence is triangulated and preserved for accountability processes.
Browse Khthon's full catalogue of country and case reports across seven global regions, or get involved with our ongoing investigations.
