NEW DELHI: Maoist rebels killed six policemen Sunday with a roadside bomb in a remote forest in eastern India, where the guerrillas have been waging an insurgency for decades. Another officer was injured when their vehicle was hit in the Dantewada district of Chhattisgarh state, said senior state police officer Sunder Raj P. The police were escorting a truck carrying material for road construction. Raj said a search was under way for the attackers.