The encounter took place at Ghagrabeda village, about 35 km from Ranchi, on Ranchi-Jamshedpur National Highway 33 last night, Superintendent of Police (Rural), Raj Kumar Lakra said.
Lakra said two policemen who sustained injuries, were airlifted to Ranchi at midnight where they were undergoing treatment. Their condition was stated to be out of danger.
Acting on a tip-off about the movement of a group of Naxals who had assembled in the jungle, security personnel comprising district armed police and CRPF rushed to the spot, Lakra said.
Some other naxals were suspected to have sustained injuries in the encounter, which lasted for a couple of hours, but managed to escape, Lakra said, adding that a massive search operation was launched this morning to trace them.