SHILLONG, July 25: In a major breakthrough, the Meghalaya Police arrested a hardcore National Socialist Council of Nagaland (IM) ultra at Jingkieng Nongshiliang here on Monday, reports UNI. The arrested militant, identified as Momba Moa, claimed to be a sergeant major in the NSCN(IM) and the commander-in-charge of operations in Shillong, police said on Tuesday. A .32 Chinese-made pistol with two magazines, 7 live bullets, two Chinese-made hand-grenades and several incriminating documents were seized from his possession. According to police, Moa, who was wanted in connection with several criminal cases, had confessed his involvement in the shootout incident near Nagaland House here last year, in which a police constable was killed. Moa also confessed that he and his accomplices had looted Rs 3 lakh from a Marwari businessman at Garikhana in the city last year.