Gunmen have killed an aid worker in an ambush in the east of the Democratic Republic of Congo.

Aid group World Vision said another of its employees was seriously wounded, and two were kidnapped during Wednesday’s attack on a convoy in Lubero in North Kivu Province.

The organisation denounced the incident which it said was an attack on the most vulnerable children and communities the staff had been serving.

A local official said the ambush was carried out by the militia known as the Mai-Mai which has been active in eastern DR Congo since the early 1990s.