Intel Corp.

Report: Gunmen still control metals mined for modern gadgets

Violent gunmen still menace pick-and-shovel miners in eastern Congo, a new report finds, despite years of efforts to loosen their grip by local reformers, Western activists and companies like Apple and Intel that use minerals from the African region in their products.

Conditions are improving for miners who dig the ore that's processed into tin, tungsten and tantalum for smartphones and other electronics, though some still face interference from armed groups. But slumping demand and depressed prices for those minerals have driven many workers to dig instead for gold that's used in electronics, jewelry and other consumer products sold by Western companies.

Armed groups hold...