Burkina Faso has suffered the most, with 2,725 deaths.
After decades of violent extremism, the ADF terror group formally affiliated itself with Islamic State in 2019.
Hungarian State Secretary expressed his sympathy towards the local Christian community.
Benin, a coastal state, is believed to be targeted by jihadi rebels to keep supply lines open and recruit more people.
According to a recent research, three times more Christians are murdered than Nigerians of another faith.
The nuns are associated with the Rural Missionaries of the Philippines, a Catholic group.
On June 12, another 11 Christians were killed in Benue State’s Igama community in the Okpokwu Local Government Area.