"Some of our personnel also sustained injuries. But we cannot immediately say the nature of injuries. We are yet to receive a report from the Cachar district police," he said.
According to sources, police arrested three militants, whose affiliations are yet to be made public, from East Dholai Ganganagar on Tuesday night.
"Police seized one AK-47 rifle, one pistol and other arms from the autorickshaw in which they were travelling. A police team took the trio to Bhaban Hills area today morning in search of other rebels. At that time, the encounter happened," they added.
According to a source, three militants were killed in the gunfight, which lasted more than an hour, while three policemen also sustained bullet injuries.
"All the injured have been admitted to Silchar Medical College and Hospital for treatment," he added.
Cachar Superintendent of Police Numal Mahatta and other senior officials rushed to the spot.