Police said the security force reached the jungle within the Salboni and Goaltore police limits after getting information that the rebels and CPI(M) activists exchanged fire in the area in the morning.
As soon as they reached the area, the Maoists opened fire at them and an encounter soon between ensued between the two sides.
Security sources have also spotted a body in the jungle, but they were not in a position to go near it, police said.