<span style="color: #222222; font-family: arial, helvetica, sans-serif; font-size: small;">The National Investigation Agency has arrested a militant of NSCN-IM group in connection with the killing of Arunachal Pradesh MLA Tirong Aboh.<br style="color: #222222; font-family: arial, helvetica, sans-serif; font-size: small;" />''<br style="color: #222222; font-family: arial, helvetica, sans-serif; font-size: small;" />''An official spokesman said, the 37-year-old Ellie Ketok was arrested from Nagaland's Dimapur by a joint team of the terror probe agency and the Army. The NIA had earlier arrested five persons in this case.<br style="color: #222222; font-family: arial, helvetica, sans-serif; font-size: small;" />''<br style="color: #222222; font-family: arial, helvetica, sans-serif; font-size: small;" />''Nationalist Peoples' Party MLA Aboh, his son and nine others were killed when suspected NSCN-IM militants opened fire at their vehicles near 12 Mile area in Tirap district on May 21.</span>