The Nigerian government announced on Thursday that its military troops have killed the leader of the Islamic State’s West Africa Province (ISWAP), Malam Bako.

Bako had succeeded Abu Musab al-Barnawi, who himself was killed by Nigerian troops two weeks ago. Al-Barnawi was the son of Boko Haram founder, Mohammed Yusuf.

Army spokesman Brigadier Benard Onyuko said in a statement that Nigerian troops had conducted several raids and airstrikes on suspected ISWAP locations. Malam Bako was killed in one such raid.

“In the course of the operations within the period, a total of 38 terrorist elements were neutralized, including the ISWAP’s new leader, Bako,” Onyuko said. He declined to discuss any details of the operation.