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