The police on Tuesday busted a Maoist camp in Odisha's Sonepur district following an encounter with the ultras.
While a personnel of the state's elite anti-Naxal Special Operations Group (SOG) was injured in the encounter, police said some Maoists might have died.
The police raided the Maoist camp in a forest near Patrapali village in the district, about 340 km west of Bhubaneswar, in the afternoon after getting concrete information about it.
The Maoists exchanged fire with the police for some time before sneaking into deeper forest.
"The police recovered five guns, two grenades and some bombs from the camp deserted by Maoists after the encounter," northern range deputy inspector general of police Sanjay Kumar told HT, adding that some high profile Maoists were believed to be in the camp.
He said the whole area had been cordoned off and a search operation was on.