"The Centre has formally indicated that we should not pursue further negotiations (for peace talks) with the GNLA," Sangma said.
He said the decision in this regard came in the wake of the GNLA's involvement in various criminal activities in the past few months.
"In spite of our repeated reminders, GNLA continued to indulge in various criminal activities including killing and crimes against women and other helpless people," he said.
He also reminded that the state government had maintained that all militant organisations should stop all their criminal activities if they wanted to engage in dialogues for peace.
Urging those who took up arms to return to mainstream lifestyle, Sangma said, "It is therefore necessary for these outfits to start paving the way for permanent peace and progress of the state by surrendering and come over ground and look at the opportunities of how to be responsible in creating positive environment for the welfare of the people of whose interest they profess to be representing."