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The Indian government has announced it will launch a new campaign to combat Maoist rebels who control a vast mineral-rich area of central India.

The Maoists have retaliated with a series of attacks on the police. They say they're fighting on behalf of India’s 'tribals' – people who have stuck to their traditional way of life in the jungle. Now the tribes are caught in the middle of the fighting.

Mark Tully warns that the government's campaign could be long and brutal.