"While one platoon of state armed police was deployed at the border hamlet of North Chaltlang, patrolling by the armed personnel was also stepped up along the sensitive pockets of the border in the wake of threats by the ultras," L Hrangnawna Deputy Inspector General of police (northern range) said.

"We cannot be everywhere and the boundaries are extremely porous. But we are our best to seal the border," he said.

Additional police personnel have also been posted along the Mizoram-Assam border areas to prevent any insurgent group sneak in and interfere in the hustings.

While the state government has asked for 15 additional companies of central para-military forces, the Centre have so far dispatched only five companies. So the state had to manage from its own armed police strength, the DIG said.

The state has three Mizoram Armed Police battalions and four India Reserve Battalions besides policemen spread over eight districts.

The administration has deployed more policemen in the border areas in view of threats by Hmar People's Convention (Democratic) received by village leaders along the areas adjoining Manipur, last week.