India Maoists kill 20 cops

Maoist rebels have killed at least 20 policemen in the Indian state of Chhattisgarh, police say. The patrol was on its way to provide security to workers building a road in Sukma district when rebels fired at them, officials say. Twenty-five policemen were injured in the attack, senior police officer Mukesh Gupta said. Chhattisgarh is a stronghold of the rebels who say they are fighting for the rights of the poor. The Maoists are active in more than a third of India's 600 districts and control large areas of several states in a "red corridor" stretching from north-east to central India. Tuesday's ambush happened in the Tongpal area of Sukma. It is not clear whether the rebels suffered any casualties, according to BBC.