A carbine, a double barrel rifle, a 9 mm pistol, and 50 rounds of ammunition were seized from them, Sundergarh SP Pinak Mishra said.
Among the arrested were PLFI zonal committee member Arjun Rana and the Koida-Barbil area commander Karan Sai, the police officer said.
The leaders were actively involved in a number of crimes in Keonjhar, Sundargarh and neighbouring Jharkhand, he added.
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