Hundreds of policemen in eastern India are searching for 13 colleagues who were ambushed by suspected Maoist rebels on Sunday.
The officers have been missing since their convoy was ambushed by gunmen at a citysome 90 kilometers from the capital of Chattisgarh state. The gunmen killed 30 paramilitary troops in the altercation.
Police say their forces have fought skirmishes with rebels, but so far have not located their missing colleagues.
Security analysts say the proximity of the attack to the state capital is an indication that the rebels' influence is widening in one of India's poorest states.
Maoist guerrillas are active in a forested belt running through several states in eastern India. In recent weeks, hundreds of soldiers have pursue rebels in nearby West Bengal state.
The Maoist rebels are part of a wider group of insurgents known as Naxalites who say they fight for the rights of the poor.
The Indian government has declared the movement a terrorist group and called it one of the greatest internal threats India faces.