Leading global brands, including Amazon, Ericsson, and Sony, are "likely" to have sourced minerals linked to a militia accused of widespread sexual violence, summary executions, and torture, according to a new investigation.

The companies allegedly acquired coltan, a crucial component for mobile phones and computers, smuggled from mines in the Democratic Republic of the Congo (DRC) that are occupied by the M23 militia. The M23 has been accused of committing numerous atrocities in eastern DRC.

Global Witness, the organization behind the year-long investigation, stated that the coltan is smuggled across the border to Rwanda before being moved on by coltan exporters used by major international firms. The investigation alleged that the mineral has likely also found its way into products from brands such as Microsoft, Toyota, Nvidia, and Vodafone.

Alex Kopp, senior policy and advocacy adviser at Global Witness, highlighted the grim reality behind consumer electronics, stating, "Behind our everyday tech lies a supply chain tainted by violence, exploitation and human suffering." He called for government intervention to hold companies accountable and for sanctions against those whose financial activities enable the M23's brutal occupation of eastern DRC.

The minerals in question originate from the Rubaya site in North Kivu province, which is estimated to hold about 15% of the world's coltan reserves. The M23 militia, reportedly backed by up to 7,000 Rwandan troops operating within the DRC, seized control of these mines approximately two years ago. Since then, the militia has been levying a charge on every kilogram of coltan extracted from the area.

Global Witness's findings raise serious concerns about the transparency and ethical sourcing within the complex supply chains of the technology and automotive industries. The report details how minerals, essential for modern devices, can become entangled with armed conflict and human rights abuses, often with little oversight.

The investigation points to a systemic issue where minerals are extracted under duress and then laundered through international trade routes, making it difficult for companies to trace their origins. The reliance on intermediaries and the vast distances involved create opportunities for illicit trade to flourish.

This situation underscores the ongoing challenges in ensuring conflict-free minerals reach consumers. The report urges greater due diligence from companies and stronger regulatory frameworks to prevent the exploitation of resources from conflict zones and to protect civilian populations from militia violence.