"The cadres were rounded up from forest of Keelam village under Chhote Dongar police station limits last evening," a senior police official told PTI.
Acting on specific inputs that Maoists had convened a meeting in Keelam area, located around 400 km away from here, to carry out some evil designs, a joint team of Special Task Force (STF) and district forces had launched a search operation, he said.
While cordoning off the interior forests, security forces apprehended 13 suspects, who later admitted to their involvement with the outlawed CPI (Maoist) as lower rank cadres, he claimed.
Of them, Patturam was also heading Dandakaranya Adivasi Kisan Majdoor Sangthan (DAKMS) -- a frontal wing of Maoists in Keelam area, the official said, adding that he was carrying a reward of Rs one lakh on his head.
They all were involved in incidents like attempt to murder, loot, arson and torching vehicles in the region, he added.