Nigerian authorities have launched an investigation into the deaths of 37 suspected illegal miners who died in custody in Niger State, northeastern Nigeria, as the incident occurred following a security operation on Tuesday and Wednesday that led to the arrest of scores of miners. Officials initially suggested disease as the cause of death, but survivor accounts and intelligence reports point to overcrowding and inadequate ventilation in the detention facility.

Detention Conditions and Survivor Accounts

Survivor Dauda Shehu told The Associated Press that 65 detainees were crammed into a poorly ventilated cell. He described the moment when they realized they could not breathe: “All of a sudden, we realized that we could not breathe and we started scrambling to get fresh air.” According to Shehu, detainees tried to alert guards by banging on the cell door.

The head of the Nigeria Security and Civil Defence Corps (NSCDC) in Niger State, Suberu Siyaka Aniviye, stated that officials suspect disease was the cause of the deaths. However, the bodies have been sent for “further medical examination to establish the actual cause of death.” Aniviye did not specify the type of disease suspected.

Security Operations and Broader Context

The Niger state police chief ordered an immediate investigation into the deaths, according to police spokesman Wasiu Abiodun, though the NSCDC had rounded up “scores of suspected illegal miners” during a security operation. In the early hours of September 17, 2026, many of the detained suspects were found dead.

Preliminary intelligence suggests the fatalities may have resulted from overcrowding and inadequate ventilation within the detention facility; the civil defense operation targeted illegal mining operations in a region known for small-scale gold mining. The gold extracted from these mines is often smuggled out to the United Arab Emirates, from where it is laundered into the global supply chain in Europe, the United States, Asia, and South Africa, according to a 2024 SwissAid report.

Broader Implications and Economic Factors

Beyond gold, Niger State is rich in tantalite, copper, and lithium—minerals in high demand for electric vehicles and clean energy technology, the scramble for these resources has also fueled violence by criminal gangs known locally as bandits. These gangs tax the miners and demand a cut from the extracted ore as a levy to allow access to the pits.

The incident has sparked concern among families and local officials, Relatives of the victims have been urged to come forward with any information that could help in the investigation. Meanwhile, the broader issue of illegal mining and its impact on local communities and the environment remains a pressing concern in the region.