Superintendent of Police of Biswanath Chariali Police District under Sonitpur, Manabendra Dev Ray said the suspected militant was apprehended from Karibil near Assam-Arunachal Pradesh border last night.
He has been identified as Manas Swargiwari, Ray said.
The SP said a US-made 7.65 mm pistol, its magazine, live ammunition and some documents were recovered from the NDFB(S) cadre.