"The main issue has been free access to sophisticated arms and ammunition by the militants," he told reporters on the sidelines of a programme to launch Police Patrol Vehicles for Shillong and Tura towns here.
According to the Chief Minister, these arms are not manufactured in Shillong or any other locations in the region but were smuggled across the international borders.
A large part of these borders are un-fenced and difficult to man, "We are engaging with the Centre in this regard," the Chief Minister said.
"Once the borders are sealed, this will ensure that arms and ammunition available to the militant groups in the past do not come anymore. Only then you will see that there is sustainable peace," he said.
Maintaining that his government is seized of the problem of militancy in the state, the Chief Minister said, "There is a need to overcome the issue of militancy and to see the actual root cause. Only the use of police force and neutralising any existing militancy will not ensure sustain peace because neutralising one militant outfit is going to be an end