Agartala, March 1 :     Mounting ethnic tension has been reported from Karaticherra area in Dhalai district following the murder of a 65-year-old tribal yesterday. Police reinforcements were rushed to the spot shortly after the incident. Police sources said a group of armed Bengali miscreants hacked to death the tribal civilian, Jagat Sadhan Jamatya, yesterday in Karaticherra. The sources said he had been killed as he was a witness to incidents of theft of government property and had threatened to disclose the names to the police. The killing triggered ethnic tension and reinforcements had to be rushed to prevent an ethnic clash. Sources said a Bengali civilian, Surendra Nama, has been arrested in connection with the murder. Meanwhile, the state police have received information that militants of the National Liberation Front of Tripura (NLFT) have made bulk purchases of sophisticated arms from international arms dealers in Bangkok. Most of the arms, purchased at an estimated cost of Rs 10 lakh, have entered Tripura through the Chittagong Hill Tracts of Bangladesh. Helped by agents of the National Socialist Council of Nagaland (Isak-Muivah), the NLFT has so far purchased 286 AK-47 and 250 AK-56 assault rifles, 137 7.62 self-loading rifles, 25 M-16 rifles and huge quantities of ammunition. Sex scandal: The Tripura Women?s Commission has sought the intervention of chief minister Manik Sarkar for an impartial inquiry into the Kakraban Navodaya Vidyalay sex scandal. Women?s Commission sources said Sarkar had instructed the director-general of police to ensure that the investigations into the case progressed smoothly. He had also firmly opposed the idea of a CID inquiry, proposed by the superintendent of police, they added. Meanwhile, the minor girl?s illegitimate child, born on February 2, had fallen ill and was admitted to the intensive care unit of IGM hospital, commission member secretary Meenakshi Sen said. The baby was now better, she added. Sen said the commission was trying to ensure continuation of normal education for the minor mother and her elder sister at the Kakraban Navodaya school.