 President Mohammed Buhari has described threats by the Niger Delta Avengers to attack oil installations in the South-South region as unnecessary. Femi-additional presidential spokesman in a statement on Sunday quoted Buhari as saying all issues raised by the group were already responded to when the president met with the leadership of the Niger Delta and Ijar National Congress at the presidential villa on Thursday. The militant group in a statement on Saturday had announced the launch of Operation Humble, a new mission to resume attacks in the oil-reached region. They said the South-South remains the most underdeveloped region in the country, with their needs and interests undermined by the failed Nigerian state.