The Centre has not undertaken any operation against Maoists and it is only assisting state governments in their counter-insurgency measures, Home Minister P Chidambaram said on Friday.

"There is no operation. Operation is your invention. State governments are carrying out all the (counter) insurgency measures against Naxalites. "Wherever necessary the Central government is providing assistance by way of central paramilitary forces, intelligence sharing and technical help. State police is responsible for maintaining law and order.
Operation Greenhunt is purely an invention of the media," he told reporters here.