The gun battle ensued as the security personnel were on a combing operation in the Maoist-affected areas of the sub-division, Superintendent of Police (Rural), Shailendra Kumar Sinha said.
Sinha said details are being awaited as the security personnel were combing the area after the Maoists retreated.
The ultras left behind fire-arms, detonators etc, he said, adding that a detailed report of the encounter was awaited.
No casualty was reported on the police side.