Army chief General Dalbir Singh left here on Friday to review the security situation in the northeastern states.
The army chief will visit the area of 3 Corps, which covers Arunachal Pradesh and Nagaland.
The army declined to divulge more details about the visit, which comes a day after two militants were killed and another was injured in an gunfight with security forces at Avangkhu in Phek district of Nagaland.
The intensity of anti-terror operations in the area has increased after an attack on an army convoy in Manipur in June, in which 18 soldiers were killde and 11 others injured.
The army, in a one-of-its-kind operation, had attacked two terrorist camps along the India-Myanmar border.
The Indian Army said the operations were carried out in coordination with Myanmar following specific intelligence inputs.