An aid worker has died from gunshot wounds in eastern Democratic Republic of Congo, where Rwanda-backed rebels who captured two key cities in recent weeks are trying to seize more territory. Jerry Muhindo Kavali, 49, was injured two days ago by a bullet that struck the Médecins Sans Frontières (MSF) office in Masisi where he was working.

The M23 rebels are the most prominent of more than 100 armed groups that have been vying for control of eastern Congo’s trillions of dollars in mineral wealth.