The Centre on Thursday signed an agreement with eight tribal militant organisations based inAssamto bring a lasting peace in some areas of the state.The tripartite agreement among the central and state governments and the eight groups, including All Adivasi National Liberation Army, Adivasi Cobra Militant of Assam, Birsa Commando Force, Santhal Tiger Force, and Adivasi People’s Army, was signed here in presence ofUnion HomeMinisterAmit Shahand Assam Chief MinisterHimanta Biswa Sarmaamong others.