Maoist guerrillas have ambushed a paramilitary patrol in India central state of Chhattisgarh, killing at least 24 policemen and wounding six in one of the deadliest attacks this year.

The attack was the second in as many months in remote Sukma district in the forests of Chhattisgarh State, about 400 KMs from state capital Raipur.

Maoist rebels have grown in strength in recent times in areas where poor, tribal villagers have come into conflict with mining companies seeking resources for Industrialisation.

Maoists seeking to overthrow the government have operated for decades across a wide swathe of central and eastern India.