A drone strike in Somalia has killed four senior members of the Al-Qaeda-affiliated Shebab, including the alleged mastermind of the Garissa University massacre in Kenya in April, a Kenyan interior ministry spokesman said Thursday.

The strike, which took place in the early hours of Thursday, claimed the life of Mohamed Mohamud — also known by the aliases of Dulyadin, Kuno and Gamadhere — who was on Kenya’s wanted list after the massacre, spokesman Mwenda Njoka said.