SP Varun Kumar Sinha said the police had received information about a training programme being held by Maoists in the forest following which a joint operation was launched.
One suspected Maoist identified as Murmur Koda was arrested during the operation, he said.
The arrested Maoist was involved in killing of two CRPF personnel during Lok Sabha election last year, Sinha said.
A woman cadre, however, managed to flee, he said.