A militant was killed in afirefight between insurgents of the NSCN(IM) and Zeliangrong United Front (Kamson) faction in Manipur's Tamenglong district on Friday, police said.The firefight took place in Longchai village near the Assam-Manipur border around 7 am, a senior police officer said."The slain militant has been identified as 31-year-old Kadining Golmei. However, it is yet to be ascertained which outfit he was a member of," he said.An AK-56 rifle and ammunition have also been seized, the officer added.