Six militants of the Dimsa National Liberation Army (DNLA), a small insurgent group, were killed in an encounter with police and Assam Rifles personnel in Assam's Karbi Anglong district on Sunday.
A joint operation was launched in Dhansiri area of Karbi Anglong in the wee hours of Sunday.
One security personnel was injured in the operation.
GP Singh, special director general of Assam Police (law and order) said there was a report that two more insurgents were killed in the encounter but was yet to be confirmed as only six bodies were recovered from the site.
The operation was launched after two traders were killed by the suspected DNLA militants in separate incidents in Karbi Anglong district recently.
"This is a big success against militancy and crime in the district as DNLA has been involved in several heinous crimes including kidnapping, extortion, murder which are not tolerated in Assam," director general of police, Bhaskar Jyoti Mahanta said.
Several cadres of the outfit had earlier laid down their weapons and decided to join the peace process but a faction was still carrying out violent activities in the district.
Security forces said efforts were on to nab all the cadres of DNLA, which were involved in killings, abduction and extortion in the district. Karbi Anglong had witnessed militancy for long but all major outfits have joined the peace process and an effort is underway to establish permanent peace.