The source said that Coastal Projects Limited, a nationally reputed construction agency, which was engaged in construction of barbed wire fence in the Tripura-Bangla frontiers under supervision of NPCC, suffered massive damages in the hands of belligerent groups, mainly the banned National Liberation Front of Tripura (NLFT).

Out of a 52 Km stretch of international boundary in Kanchanpur sub-division, border fence erection was reported complete in 30 Km area. Coastal Projects Limited, which was awarded the work order for erecting fence in the rather rugged and challenging terrain with 18 Km borderline ranging between Simanapur to Jamaraipara in the area, lost several workers, engineers and pieces of equipments apart from regular extortion threats from militants.

Speaking about damages sustained by the agency during its operation in Tripura, a source inside Coastal Projects Limited today said that a senior engineer from Kerala – GS Muni was killed in a NLFT ambush way back in 2011. Swapan Deb and Nitish Ghosh – two workers engaged for erecting barbed wire in the area were kidnapped in April, 2013. The duo has no trace till date.

However, with stalling of barbed wire fence construction in the entire stretch, grave situations have arisen including national security crisis due to uncontrolled possibilities of militant intrusion and illegal migration from the Bangla soil.

It is to be mentioned here that earlier, all the Border Outposts along the 856-km-long Tripura-Bangladesh International Border have been put on maximum alert to thwart any attempt of infiltration by the terrorists or Indian insurgents operating from the soil of the neighbouring country, a senior BSF officer said.

"We do not see strong possibilities of intrusion of Islamic terrorists like JMB and others to enter into the state. But the borders in the Feni and Moulavibazar districts of Bangladesh are still vulnerable, so we have put all the border outposts (BOPs) in alert," the senior BSF officer said. 

A BSF jawan and a civilian driver were killed and another person was injured on November 17 when suspected NLFT militants fired at them at Khantlang, a village bordering Chittagong Hill Tract in Bangladesh.

Another BSF jawan was shot dead by the ultras of the same group at Maldapara in Dhalai district on October 23.

He said there are 32 camps of insurgents of Tripura in Chittagong Hill Tract of Bangladesh (CHT) and in Sylhet district of which 21 belonged to banned National Liberation Front of Tripura (NLFT).