The militant, identified as Mithun Rabha alias Rocky, was apprehended by a team of City Police from Rajaduar area of North Guwahati.
A grenade, cash and mobile handsets were recovered from the militant who was allegedly involved in an attack on CRPF personnel on August nine at Khardang under Krishnai police station in Goalpara districts.
Rabha was also allegedly involved in issuing extortion notes to several people and organisations.