"About a dozen Maoists were hit by the security forces and there is all possibility that they might have been killed, West Singhbhum Superintendent of Police Akhilesh Jha said.
However, no body has been recovered, Jha said.
The security personnel were injured near Bandgaon in the encounter which lasted for 24 hours.
He said a camp of the Maoists was demolished during the anti-Naxal drive yesterday and 20 claymore bombs seized and destroyed.
He said a camp of the Maoists was demolished during the anti-Naxal drive yesterday and 20 claymore bombs seized and destroyed. All the injured security personnel were admitted to a hospital in Ranchi.
Self-styled Maoist area commander 'KP' and his comrades Anmol and Animesh were among the Maoists, who fired around 5000 rounds during the encounter, the SP said.