Agartala, Jan 10 (Agencies): The Border Security Force (BSF), on Monday, said it will now use chopper to guard unfenced areas in the remote areas and fire rubber bullets to catch intruders along the 856-km-long Indo-Bangla border in Tripura.

“The hangar is ready at the Agartala airport and the chopper will be pressed into service latest by early next month. It would be used mainly for aerial surveillance of about 55 km unfenced border in the remote and hilly areas having difficult terrains,” said Inspector General of Tripura Frontier of BSF SK Jain.

Despite fencing in 90 per cent areas, there were movements of insurgents, as the ultras enter into the Indian territory, taking the advantage of porous border in the unfenced areas.

The BSF would also use non-lethal rifles to shoot rubber bullets instead of fire cartridges so that infiltrators are not killed but injured painfully and can be caught easily.

The border guards are also now using an advance alarm system which would alert them on the attempts of infiltration. "Recently we could apprehend two smugglers by using the device," the IG said.

With the establishments of 20 more border outposts (BOP), the gap between the two BOPs would be reduced from 4.5 kilometres to 3.5 kilometres, and one more battalion of the paramilitary force would be added to the 16 battalions to guard the border.