Rwanda-backed rebels have captured two major cities in Congo's mineral-rich east after a major escalation in their yearslong fighting against Congolese forces.

Panic and looting are sweeping through eastern Congo’s second largest city as residents flee by the thousands to escape the looming advance of Rwanda-backed rebels

Rwanda-backed rebels appeared to be heading toward a third major city in eastern Congo, residents said Tuesday, as international pressure rose over the M23's expansion in a mineral-rich region that’s critical for global technology.