Naxal-outfits are collecting around Rs.50-crore annually as extortion in Jharkhand, an intelligence report revealed. Nationally, their extortion revenue is worth Rs.150-200-crore, added the report. Extortion-collection has taken a shape of industry in the state, and has led to the mushrooming of several rebel groups. Responding to the situation, Union home ministry deployed around 20-battalions of central forces in the state.