'For effective guarding of the Indo-Bangla border with Tripura, an additional 40 border outposts should be set up and an additional five battalions of the Border Security Force (BSF) should be deployed,' Sarkar said.

Meghalaya Chief Minister D.D. Lapang has asked the centre to create two more police battalions to check cross-border infiltration, a special commando battalion to fight militancy and a counter-insurgency warfare institution to provide training for police personnel in the state.

Lapang said border fencing with Bangladesh and the inter-state boundary dispute with Assam had become a cause for concern in Meghalaya.

Arunachal Pradesh has asked the Indian government to seal the entire stretch of the 440-km-long India-Myanmar border along the state in order to check the movement of insurgent outfits.

'We must be conscious of the fact that geographically northeastern states share only two percent of their boundary with the country while 98 percent is shared with neighbouring countries like Myanmar, Bhutan, China and Bangladesh,' Arunachal Pradesh Home Minister Jarbom Gamlin said.

'The possible nexus among various outfits poses a grave security threat to the nation and it has to be eliminated at any cost,' Gamlin, who represented Chief Minister Dorjee Khandu, said while addressing conference.

Mizoram Chief Minister Lal Thanhawla said: 'There will be no leniency on anti-social elements such as armed militants, unlicensed arms holders and illicit arms dealers, who pose a threat to the peace and tranquility of our mountainous state.'

India's northeast includes Mizoram, Manipur, Meghalaya, Assam, Tripura, Arunachal Pradesh, Nagaland and Sikkim.