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.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
