Four Landslides Kill Hundreds at Congo Coltan Mines Under M23 Control
Bellingcat verifies deadly mining accidents in DRC's Rubaya region, now held by Rwandan-backed armed group, raising supply chain questions for tech firms.
At least four landslides have killed hundreds of people at coltan mines in Rubaya, Democratic Republic of Congo, since the start of 2026, according to open-source investigation by Bellingcat. The mines, a major global source of coltan—a mineral essential to smartphones, laptops, and electric vehicles—are currently under the control of M23, an armed group backed by Rwanda.
Bellingcat's investigation verified the incidents using satellite imagery, social media footage, and local reporting. The Rubaya mining area sits in North Kivu province, a region that has seen intensified fighting as M23 expanded territorial control over the past two years. The group's presence complicates an already opaque supply chain for coltan, which is processed into tantalum capacitors used in consumer electronics and EVs.
The landslides underscore the human cost of artisanal mining in conflict zones. Rubaya's mines operate with minimal safety infrastructure, and M23's control introduces additional governance and traceability challenges for downstream buyers. International frameworks such as the OECD Due Diligence Guidance require companies to assess conflict mineral sourcing, but enforcement remains inconsistent.
- 01Tech and EV manufacturers must reassess coltan supply chain traceability and conflict exposure.
- 02Investors in electronics and automotive sectors face reputational and regulatory risk.
- 03Humanitarian actors confront worsening conditions for artisanal miners in M23-held territory.
- 04Governments enforcing conflict mineral rules may tighten audits on DRC-sourced tantalum.