Four militants of banned outfit ULFA were gunned down in an exchange of fire late last night in Nagaland. Official sources in Guwahati said that the incident occurred near Oting village at Mon district between Assam Rifles and a joint group of ULFA and NSCN Khaplang militants. One security personnel was martyered in the firing while a few soldiers also sustained injuries. The injured soldiers have been airlifted to Jorhat in Assam for better treatment. <br/><br/>