Two ULFA militants were killed in an encounter with the army in Tinsukia district of upper Assam while five extremists of the banned outfit, including two women, were apprehended in Sibsagar district on Wednesday.
The ultras exchanged fire with the troops near Doomdooma tea estate in Tinsukia district around 11 am before they were shot dead, police said.
The area had been cordoned off and the army operation was on to look for more extremists who could be hiding there.
Following the encounter, the army intensified its operations in the nearby Doomdooma Reserve Forest and adjacent jungles where the militants usually took shelter.
In Sibsagar district, five dreaded ULFA militants, including two women cadres, were arrested by the army from the Sonari Namtola areas along the Assam-Nagaland border when they were attempting to cross over to the neighbouring state.
A large quantity of arms, including AK-47 and 56 series assault rifles, were recovered from the five.