U.S. forces reportedly killed around 20 Islamic State West Africa Province fighters on May 17 in airstrikes near Metele in Nigeria's northeastern Borno state, following high-level operations on May 15 that killed ISWAP's deputy leader, Abu Bakr al-Mainuki, along with around three dozen fighters, The Wall Street Journal reported on May 18. Other reports indicate that al-Mainuki was killed during the joint U.S.-Nigerian raids targeting ISWAP fighters in the Lake Chad Basin, specifically on the islands of Tumbun Gini and Tumbun Dalo, involving approximately two dozen U.S. and Nigerian special forces personnel, including members of U.S. Navy SEAL Team 6, who engaged around three dozen militants on the ground.