Prince William news: Prince William condemned the attack on park rangers (Image: GETTY)
Prince William news: Prince William is the patron of Tusk Trust and the United for Wildlife (Image: GETTY)
The attack left another ranger seriously wounded - but after being treated at a hospital in Goma, his injuries were no longer considered life-threatening.
Park director Emmanuel de Merode, who was shot during service in 2014, said his team remain committed to the protection of wildlife despite the dangers.
He said: We are facing a situation that is extremely difficult, but which in no way erodes the conviction of all ICCN staff to continue our efforts.