The authorities in the Democratic Republic of Congo say suspected militiamen have killed an engineer and three rangers from the Virunga National Park.
The Congolese Institute for the Conservation of Nature (ICCN) said armed men, thought to be Mai Mai fighters, attacked a convoy of its workers on Thursday morning.
Virunga is the oldest nature reserve in Africa and a renowned sanctuary for rare species, such as mountain gorillas.
It’ has also become a hideout for the Mai Mai militias.
Various armed groups have plagued eastern Congo for decades.
