"The insurgent identified as Uttam Swargiary alias Ulafat (40) exchanged fire with the police at Hazuriguri Bombazar in Kachugaon police station," IGP LR Bishnoi told PTI.
A pistol with four live rounds of ammunition and two fired rounds, two grenades and two mobile phone sets were recovered from the slain ultra, he said.
The extremist was wanted by CBI for planting the bombs in Guwahati, Bishnoi said, adding, Swargiary was a senior cadre of the second batch of National Democratic Front of Bodoland-Songbijit.