Four Maoist guerrillas were arrested on Tuesday and a small bomb-making factory unearthed in two separate cases in Jharkhand, police said.
Police and the Central Reserve Police Force personnel arrested the four ultras — Deepak, Jogindra, Chotu and Urmila — in a joint operation in Palamu district.
The bomb-making factory was unearthed in Pirtand forest in Giridih district on the basis of information given by arrested Maoist commander Sunil Manjhi, who is in a six-day police remand.
Police seized 103 improvised explosive devices, a lathe, syringes, explosives and chemicals.
Maoists are active in 18 of the 24 districts of the state.