(FILES) This file photo taken on November 2, 2017 shows Malian soldiers, part of a joint military force, the G5 Sahel, sitting in a vehicle as they patrol on November 2, 2017 in central Mali, in the border zone with Burkina Faso and Niger. 
Oil-rich Gulf countries pledged 130 million euros on December 13, 2017 towards fighting jihadists in West Africa's Sahel region, as French President hosted leaders in a bid to boost a fledgling five-nation military force. / AFP PHOTO / Daphné BENOIT
Malian soldiers in the G5 Sahel joint military force on patrol during a 2017 operation. AFP

Burkina Faso church attack reflects rising threat in the Sahel