Gumla police have arrested four members of banned PLFI organisation including an area commander Yakub Kerketta from Dwarseni forests of the district.
Among the other arrested extremists are Etwa Barla, Rohit Topno and Suraj Kumar Singh.
Three pistols, several cartridges, a bike, 13 mobile phones and sim cards have been recovered in the operation.
Gumla SP Ashwani Kumar on Saturday stated that Yaqub Kerketta was wanted in several serious crimes committed under various police stations of the district. The state government had announced two lakh rupees for his arrest, he added.
Kumar said a police team comprising a strike unit was sent to Dwarseni forest to verify intelligence inputs regarding presence of extremists in the area. When police came near the ultras the latter started fleeing away but four of them were nabbed.
The extremists had gathered on the spot to commit crime, police said.
Police informed that Kerketta was accused in at least 10 criminal cases including murder, loot, police encounter and sticking posters. Most of his cases were lodged with the Kamdara and Basia police stations of Simdega district.